Now let's take your idea, while keeping gear drops from bosses, while adding unique crafting drops to them to make the best gear. Of course this best gear might also be terribly itemized, you'd also have to craft it yourself. It'd require 20+ kills of said boss to gather the materials to make it. It'd be themed to the raid tier of course. Not getting the loot you want from the current raid no matter how many times you've done it? Fret no longer, you can now make something that may or may not be better!