I have no problem with LFR existing.
I have no problem with LFR giving drops that use the same names/models/whatever as real raid items. (whether recolored or not)
I have no problem with casuals queueing for LFR to be able to see the bosses and raid content despite lack of skill or time to see them in their true form.
The only problem I have ever had with LFR is that it's the highest step on the entire gearing ladder leading into flexes, then normal raiding. There is literally no other options or alternatives to gearing prior to normal raids.
I'll give you a good example, I just boosted a level 90 DK because I wanted one on the opposite faction. I started with 483 gear. After I gave myself a flex 2hand strength heirloom weapon, and went to timeless isle and opened all the chests and equipped all the timeless gear that had appropriate stats (ie, not single stat pieces which are utter trash and not with stats that are useless to me) my item level jumped from the starting 483 item level to 498.
Now at this point, what are you supposed to do?
The lowest item level I have EVER seen for a flex group is 525+, never seen anything lower than that and if i'm not mistaken you need a minimum of 510 just to put yourself in queue for wing 1 flex.
So with timeless isle stuff exhausted outside of EXTENSIVE farming and RNG for each individual burden you acquire and then no promise that any item you use the burden on will even be useable, there's like a 50/50 chance it'll be garbage with a single stat that has less stat points than something 40 item levels lower.
Dungeons of course give 463s, completely useless, the boosted gear you start with is 483, which is equally useless, there is literally no other reasonable option to advance at all other than LFR. It was DESIGNED to be that MANDATORY step that you MUST take.
There are only a few ways you can bypass this mandatory step.
1. Do normal. This requires either paying for a carry or knowing people who will bring you in despite your item level. I ended up doing this myself and tanked the first 8 bosses in SOO 10-man normal at less than 500 item level tonight actually although I only got 2 items and my item level didn't increase that much. Planning on finishing the run tomorrow evening but this is a rare circumstance because most people couldn't do something as useful as tank at this item level and as DPS their damage would most likely be garbage. No one is going to bring you into a normal unless both you and they fully understand and acknowledge you're being carried.
2. Do flex. Again, not possible under normal circumstances. Lowest item level requirement for flex I have EVER seen is 525+ which is a huge increase from what someone like me has after boosting a character (or even just hitting 90 without boosting, they're in even worse shape). There is no way you'd get into a random pug flex group at item level 500 and you can't even queue for the first wing in the raid browser until 510 I believe and the other wings are even higher.
3. Farm timeless isle. This method can net you most pieces at 535 item level I believe it is, but requires hours of farming for each burden outside of uncanny luck and RNG. And then each burden only has a chance to give you a useful item anyway with most being crap. You might could get a higher item level piece, but it is possible it will suck harder than the lower level shit you already had.
Those are literally the ONLY alternatives to doing LFR. That is it. There is nothing else. Either get carried, farm unthinkable hours on timeless isle and even then you'd need like FULL timeless gear to just get high enough for flex access, or run LFR. Those are the only ways to advance your item level.
Personally, I plan on continuing to tank normal and flex until i'm high enough to start heroic content, but without my guild there to help as well as running with people who KNOW I can perform my tank role at a superb level even at 500 ilevel, there would be no way in hell i'd ever get anything done. I'd have to just queue for LFR over and over and over and over.
That is my issue with it. It is a mandatory step to gearing because the only 3 alternative routes are nearly impossible and completely unreasonable for your average joe to partake in.
LFR should be completely removed from the gearing ladder or it should be the alternate method and have some faster means of gearing via some other source like running 5-mans. I hear in WOD there's gonna be a daily quest that rewards gear for doing challenge modes equal in item level to raid finder. That is a step in the right direction, but if the pieces are random and you have no control over them at all combined with only being able to do it once per day, it's rather lackluster and will end up making LFR the only gearing path once again.
LFR should be optional. TRULY optional. When you must do it to advance up the ladder on your own (outside of being carried) it is not optional.
Should see how many people I see every hour of every day selling flex carries for 7k gold per person, they carry an entire 25-man raid through each flex wing at those rates because it makes them mountains of money and people are willing to pay it because LFR is garbage but it is mandatory garbage without cheating the system like getting a paid carry.
Thank goodness my mains have never had to do LFR because by the time that shit even releases they're already in gear far superior, but all my alts i've ever tried to do anything with have to endure it to some extent or another.
LFR loot needs to be low enough item level at all times that no one who is actually doing normal content would want to go for it. That is the ideal goal. It has NOTHING to do with elitism, wanting to be better than other people or anything else, it's the fact that LFR is a miserable place to be because the queues take forever, the people in there have either no clue what is going on or simply dont care about what is going on so they wipe and fail a lot, and is just in general a very very poor experience but they design the game in such a way that you must go in there outside of being carried long enough that you're above the level where you need LFR anymore.
In my ideal world, LFR loot for a tier would be exactly equal to the normal mode item level of the previous raid tier. For example Siege LFR should be TOT normal ilevel which is 522. By doing that, it completely removes the need to do LFR for anyone who does real raids and makes it an alternative to doing the actual raids but you aren't forced into doing it.
As it stands right now, SOO lfr is 6 item levels higher than TOT normal. So even if you had a FULL SET of REAL raid gear from normal TOT, everything in the new LFR is still superior. That is just bad design and it makes even real raiders feel they must do it for the extra item level. By keeping it equal to the last tier normal, it would also promote more groups doing the last tier of content.
Imagine how many TOT normal mode raid pugs would form weekly all over the world because people want to use it to gear quickly to get their starting gear to get into flex quicker, especially in MOP with the legendary quest needing all those items as well. Between people gearing alts and people working on their legendary, TOT normal pugs would be running overtime all the time and be a faster, easier, and more organized means of gearing. If organized raiding isn't your cup of tea, that is FINE, that is what LFR is for, or what it SHOULD BE FOR, as an alternative to real raiding. An OPTION you can choose instead, as opposed to forcing everyone through that LFR tunnel until they can claw their way out on the other side.
Lowering LFR item level would solve SO many problems. But I don't think blizzard will ever do it because then LFR would be populated entirely by baddies and casuals and they'd never kill anything and it would be even worse for them than it is now with the small percentage of quality people that do LFR and carry the rest of them. That is why it'll never be that way, and it's a damn shame.