ITT .... a bunch of people who didn't realize Destiny is pretty much an FPS MMO
At first I was a little angry, but then I realized ... wait ... this is just like World of Warcraft or any other MMO I played. I never really even expected the exotics to get buffed to begin with, let alone for them to have an upgrade path. I figured it was like other MMO's when an expansion would come out the previous gear either becomes old and not the top tier, or completely outdated.
When WoW would have a content update within an expansion, a new raid was released, or new heroics added that always came with new gear that was better than the previous. It wouldn't completely make the old stuff irrelevant as it was still valid for the upgrade path to a better average item number on that character, but if you wanted the best you had to do the new raid or the new vendor gear.
And when a new actual expansion came out, the best gear in the game would soon be replaced by greens / blues from the starting quests etc. Yes it sucked when that happened, but it was part of the progression. Its kind of funny, when I first started playing Destiny and I was treating it as simply a loot drop game and relying on RNG for everything I really started to hate it. One day I finally started reading up about reputation grinds, vendor gear etc. and it clicked. This is just an FPS MMO and since MMO are like a drug to me I really sank my teeth in and fell in love. This is just another extension of that.
Yes if I want to make my newly acquired (finally) Gjallerhorn the best it can possibly be I need to "upgrade" it and then re-level it and I probably will for that. But at the same time, I could just keep it, or one of my 3x Suros Regimes maxed at 300 and be just fine. I will probably continue to use my Fatebringers, and Vex Mythoclasts and Vision of Confluence just because elemental primaries are so useful, even though they won't be at the new max. That is just how these MMO games are, and yes all that time I invested in maxing out 3x VoC, and 2x Vex Mytho, and 2x Fatebringers etc. took a lot of time, but boy did those weapons come in handy when I was playing the current content.
And honestly, with the bounties (especially since they were increased to 10 slots) the weapon leveling doesn't take that long. I unlocked both perks on Gjallerhorn the day I got it, it helps having 3x characters at max level so I can pass it around, but even if you don't its not terrible to wait 2-3 days and some quick bounties which usually only take about 30-45 minutes total for the vanguard ones.
I admit, I won't be playing Destiny a bunch until the new expansion now that they had laid out the content plans, but I needed a break anyways. And when the expansion does hit I'm sure I'll be diving right back in to start getting more phat lewts. I just wish they would hurry up and increase the Vault size.... that is a VERY much needed thing. Until then I have Far Cry 4 to play... and Smash Bros, and Sunset Overdrive, and GTA 5 and a bunch of other games I have neglected since Destiny came out.