Ok, my 2sen here.

I just came back to WoW after a 5 year absence. I have to say that things are different. Not good, not bad just different. I like how all the talent trees seem to be viable. No more "Manatide Shaman only!" or "Assassination rogues need not apply!".

I don't think the simplification of the talent tree made playing simple. In fact, it may have led to deeper play-styles. There seems to be more focus on your own types of rotation rather than a cookie-cutter build with cookie-cutter rotation.