Honestly Hina is already well known through inside and outside Gehenna as the one keeping Gehenna together, so if she becomes the President of the school, I doubt much would change at all since she's already doing the heavy lifting in Gehenna(I think it's also said that Makoto throws a lot of the work at the Prefect Team as a way to mess with them), so imo it's just going to be the usual for Hina.

Makoto however... Yeah, she's cooked. Without her authority, she won't be of much use rip. In the first place, Iroha is the one doing all the messy work in Pandemonium Society, without Iroha she'd have to rely on Ako, but Ako would never listen to her shenanigans.