I just hit 85 on my Mage with save honor I got chest and trinket, rest is blue crafted PvP gear, I am having fun and killing players. I am actually doing better with this fresh 50 than my epic PvP geared lock.
Sure, when completely out geared I hurt, but the thing about Frost Mages is try and kill them, its last man standing!
If my healer is alive I will not die first, will not happen even in crap gear!