There are some issues with the new patch (what's new?) specifically with graphic corruption. And for me with the 295 gTX, the performance has gone down...in some situations....but still playable and still fun.
Game play is brilliant for me for all classes I have rolled for PVE. I have rolled, Barb (lvl 80), Tos (lvl 31), Bear shaman(lvl 35), Guardian (lvl 70) and they are all fun to play in PVE. Ok, except the barb, the barb is gimped for PVE but, you have to learn to adapt to your chosen feats)
PVP apparently needs more balance
They recently added Yimir's Pass (brilliant for 60-70 toons) and now, Slaughterhouse (lvl 80 SP) and Xibabalu or something (lvl 80 dungeon for MP) and other parts which extends the funs RAIDing for gear!