Gear replacement in a new expansion comes to this: Dragon soul gear has a lot of sockets, and epic gems put you over budget (and more or less all of those overbudget stats are going to be agility). It will take at least 13-14 item level points difference for MoP leveling gear to replace a dragon soul piece. Keep in mind leveling gear doesn't have sockets. Even with some of the second zone quest rewards my agility dropped substantially when I replaced my DS gear. The difference is about 600 agility (!). I had about 6800 agility at level 87 in DS gear, and 6200 agility in leveling gear, and I don't think 2k health is worth 600 agility (the leveling gear put me at 179k health, the DS gear at about 176-177). My rogue on live is at 400 ilevel as of when I copied over.