I definatly wouldnt mind WoW having some kind of AA (Alternate Ability) feature like EverQuest has. Even as a casual player, I've ran out of things (the fun ones) to do on my main, which either forces me to play an alt or five if i want to keep playing. AA's were the bomb, and still are.
I did enjoy SWtor alot, sadly everyone dissapeared and the bugs never got fixed (I believe they still are present).
Comparing and calling other MMO's a "clone" is kind of saying that people who make square TV's now copied the guys who made square TV's in the 80s. It works, so people will keep doing just that.