The problem isn't wanting guaranteed loot, it's more a psychological thing.
Before, you saw what dropped and had a chance at winning that item. Now, all you see is that you received a bag of gold. Seeing the loot drop that you can roll for gives you a higher impression that you could receive loot rather than just seeing nothing.
Honestly, I think it wouldn't had been so bad if they had did a better job at fixing the old system. Make it to where most everything is Unique, and people can't roll if they have the item being rolled on. (Not sure how that would work with Tier tokens though...)
But you are right. It is a psychological thing. For most people, winning that bag of gold equates to essentially getting nothing.
I'm betting they up the loot chance at some point. The beginning of these expansions always seem to have some bad teething problems then smooth out a bit after the first major patch. That's why I'm not even bothering with gearing at all now.
Or you could wait a few content patches, wait until some new dungeons get released with Epics that completely overpower most of what's in the 1st tier of raiding. (By which time, there will be more raids.)
They're probably not going to do that again (feedback from raiders over dragon soul dungeons was ... not positive at all). They want progression to be through lfr and not through dungeons. Then again this is Blizz, there's always a chance they flip flop.
Well, they've already done it twice with the Frozen Halls in Wrath (equivalent or better gear than Ulduar) and Hour of Twilight in Cata (equivalent to Normal FL). Granted, those were towards the end of their respective expansions.