My humble opinion on Nexon's path.

Mobility in maplestory isn't that good either. Proof of it is that, as of late, to fix it they've had to give every character flash jump and vertical jumps. The jobs that don't have one suffer a lot by comparison when training and specially while bossing. In any case maplestory's main problems don't come from it's technical aspects, they come from the way Nexon manages the game.