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.

Mobility != Control. It's a completely different situation. When I try to move around in LaTale or WonderKing, it doesn't feel fluid, it doesn't feel "natural" in the sense that a regular 2D game would, for example Castlevania or Odin Sphere. MapleStory is signficantly better, feeling like a true 2D game where the others fail.

In any case maplestory's main problems don't come from it's technical aspects, they come from the way Nexon manages the game.

Which is exactly my point. Technically, MapleStory is extremely well done while the other games are not, which is why MapleStory continues to be popular even with all of its issues.