PvP in this game is amazingly rich & well-balanced actually.

The PvP-exclusive abilities that are unique to each class are extremely well designed too.

WellFooled is right in that the learning curve is steep... the reward is great however.

It takes some time to learn how to beat the cheese-tactics but it's honestly not difficult (don't let BLM's freely cast sleep, it's a simple solution).

And they're just that, cheese-tactics... experienced players know how to crush them & further experienced players know other methods of play/more advanced tactics that otherwise trump them.