Will gach, cubes etc. soon become illegal?

I would think CWK, actual and JQ, would be enough proof to the inaccuracy of your stance.
Some of the things implemented there were considered impossible too, until the did them.

The JQs do generally have decent hit detect, that's true. I'm not sure then; I've always considered area dodging and stuff like that to be more of a 3D game setup, though thinking back LaTale had bosses that required area dodge and doing things like flipping switches et cetera during the boss fights. Though it also had 4 person party as max if I recall...