This looks like it will be an MMO version of Disgaea... in which case... hopefully there is a level 9999 cap on it. I will definitely check it out, I liked RO and this doesn't look too different.
BTW, almost all MMOs are turn based. WoW, Eve Online, EQ, GW.... all of them were turn based. Now MOVING your character in this game is also tied into the turn based mechanic (which I like), so it will add strategy on top of level progression.