Ok, so 3.3.3 hit, and I'm excited. I recently made my priest my main, and this gave me a chance to spam make all the moonshroud I needed for crafted items, so my guild will let me raid (more on that later).
As I was standing in Shattrath making my moonshroud, I noticed something amazing. For those of you who weren't tailors, there was a seemingly pointless buff you used to get when you crafted specialty cloth. Here are the links.
Spellweave - Nexus Residue (20 Haste)
Ebonweave - Residue of Darkness (20 Crit)
Moonshroud - Moonshroud Residue (20 hp5/mp5)
Well, as I was making it in Shattrath, I noticed that I was still getting the buff, over and over again. It used to be a buff you got once every 4 days, in the middle of dragonblight. While it's not a huge buff, you can now do it anytime, anywhere, without a cooldown.
For example, you can do it when you're staring down the Lich King on heroic mode.
Tailoring used to be a competitive profession for casters, but now that you can stack all three of these residues for attempts on hardmode bosses it is a clear winner. And when you're done, you can just sell the cloth for the price of the mats and do it again.
So, if you're a caster class going for hardmodes, I suggest power-leveling tailoring to get the most out of your class. At least until Blizzard knocks it back in line with the other professions.