Take everything that was good about WoW (Vanilla days at lv.60 cap) and leave the bad stuff out and you have Rift.
I just bought it a week ago and I've had no complaint about it so far.
No need for extra mods because they've taken all the good things and left out all the bad things about WoW.
In terms of gameplay, it is the EXACT same as WoW.
If you're moving on from WoW, Rift will be a refreshing change with all new content. But if you're looking to move on from the genre, stay far far away.
On a side note, you can level up through PvP from 10 all the way to the cap level of 50 through the battle grounds (You get exp for killing players).