More pets more mounts. That's about all that ever changes.
On a serious note, there has been plenty of changes.
5.2 Hitted a month and a half ago and we got a new raid that has 12/12 normal and 13/13 HC.
There is plenty of things to do now, Farming reputation to farming mounts or valor or conquest like always.
5.3 will hit live pretty soon that will deliver us (i think) 7 new scenarios 1 new arena and 1 new battleground.
WoW is doing pretty great patch wise and blizzard has kept their promise, Worth the money .