item one: the quiraji guardlings did not appear in silithus at midnight last night. or at three am pacific time. or after some rolling restarts. it appears very likely at this point that nobody is getting their zookeeper title before may 1. not unexpected, but that's still a boo.
item two: people were reporting when patch 5.2 came out that they stopped getting xp from pet battles once they reached level 89, which seemed like an odd thing for blizzard to do. apparently this was not "working as intended", because last night my shaman dinged 89 and the pet battle xp kept coming in. it wasn't mentioned in any blue posts that i saw, but it appears that this got fixed some time in the last few weeks. so that's a yay.
item 3: the npc tamers used to alternate what pets they sent into battle first, resulting in the annoying tactic of yielding repeatedly until you got the initial match-up you want. since 5.2 i've noticed that they now always send out their pets in the same order (expect for when they swap pets because you stunned one). so that's a yay.
item 4: FAILSTORM is still an amazingly craptacular move. no change in 5.2. so that's a boo.
item 5: nothing to do with pet battles, but my nelfette warrior picked up something that has been missing from the game for far too long a time: a strength-based polearm! promptly re-specced her for arms and then farmed up the glorious looking hellreaver for the transmogalypse. so that's a yay.