PL shouldn't effect player skill either tbh, as the OP said, someone can pt and grind from 1 to 50 and still bad at the game, so PL isn't the fault to make player play bad but themselves for not learn their class well enough to master it. A PL can learn his/her class at lvl cap and master it, so it's all about player skill (the more exp you have with mmorpg, the more skill you got, all mmorpg are the same but only a slightly different in combat theory that can easy learn)