[@Alupi]

More like it's suppose to keep with the theme other characters, canon and OC, have about their quriks having some drawback. Even someone like Mineta who's quirk makes sticky balls (Fairly harmless on their own) have the drawback in that he can't constantly use them. Basically just a limit to how often one can use their quirks and such. Of course there are those without any notable drawback, mostly because their quirks aren't really that powerful. Asahi's quirks are all passive and don't really make him stronger than your average human. Nothing flashy, nothing impressive on his own. 

I dunno about her quirk not making the cut, I think it's plenty interesting as it is. GM's just want you to make it a bit more restricting so you aren't say, immobilizing your opponents to the floor where they can't avoid attacks with impunity.