I believe the reasoning behind the game being too, "easy" is that PL is supposed to take on a pick-up and play feel. The access to play the game whenever you want, at ease. Although, the game does also accommodate hardcore style gamers with quest systems, farming, merchanting, and otherwise.

Though, I do understand WHY you're saying all that you are, but I think STS has reasons for the way the game is put together also. ^_^