I've only been playing PvP fairly recently, so I can't comment on or compare it to the pre SB system, but I personally find it's pretty fun and fairly balanced.

Having to focus down healers encourages party coordination.
Streamlined abilities makes it accessible and evens the field in terms of skill level.

I'm not sure I'd be playing it if it used the full skill set from PvE, as PvP moves way too fast in comparison.

I do wish tanks had perhaps a little more CC and less damage though. Even just a slight reduction on their CC cooldowns, and a 200 potency reduction on their combos would be enough, to simultaneously increase their value as a leader while reducing their appeal in terms of personal kills.

Its true that I started playing PvP for the rewards, but I'm sticking around for the experience.
I'd love more maps and more frontline modes.