Shaya the only thing I could possibly think you're complaining about is momentum cancel (which is an exploit of being able to CANCEL out hitstun...which you know...kills the combos part),
and maybe grab releases...but as you know that's an exploit they thought wasn't healthy for the game, and for the sake of polish, if they were to remove the ones that killed Ness/Lucas, they would have to also fix all other frames to 30. You lose an unexpected game depth to trade ensured viability of characters. Depth or balance.
IDK Shaya, if you would like a discussion of this between Marf mains, get out the keyboards, some tea, some annoyingly screechy J-pop and we shall discuss.
EDIT: I guess Shaya left the screechy J-pop phase a while ago.
this is what happens when I'm not in the loop.