see, i agree that we need a way to balance stat inflation and content scaling. you make the upgrades from tier lvl to tier lvl, then you increase the gearing curve, and so guilds that start late have a severe disadvantage, where as the guilds that farm content for months have an advantage.
im of the opinion that better gear should make the content easier, however, it shouldn't be 100% required (granted you shouldnt' be able to stroll through ulduar in quest greens).
however, not to sound like too much QQ. T6 mage gear in BC had piles of int and spirit on it. if you were fire or frost (raiding frost lol) spirit was 100% useless to you. only arcane mages wanted it for mana regen. warlocks, however, didn't have spirit on their gear, so they got more stam, spellpower int and awesomeness.
i personally don't mind spirit, i just think there needs to be a way to balance the classes with it. either all casters get a bonus (besides mp5) from spirit, or only healers should get it. that is my opinion. so either optimize spirit gear for healers and non spirit gear for dps users.
i have a feeling we will be sharding a lot of cloth pieces in ulduar. idk about everyone else, but people will be hard pressed to drop even 5 dkp on an item that gives them no more spellpower, and 10 more spirit and int, especially if there are a small handful of well optimized gear pieces that we are all looking to aquire.
There is more to life than pew pew you know, like staying out of the fire so you can live to pew pew another day