[@Write] Hmm, I was going to reference a previous game I was in that kept a good balance between three classrooms and had semi-frequent interactions between multiple classes (through Gym class, for instance, which had all classes together) but that was a design decision from the beginning, so if there were too many in one class the GM could simply request there be more first years. That's not impossible at this point since there's still some members who haven't finished their sheets.

Quirk based classes is an idea, but if, say, someone joins as an animal form character like Tsuya/Frappy in the series then they'd probably be alone, since I don't think any of the currently accept members have a power like that. That would also deincentivize anyone thinking about a Quirk outside any of the current classes.

[@Inertia] Provided @Mentions are used well and everyone's aware of what class they're in I don't see it as I problem. If something big happens in one class (say, someone's Quirk firing off), then in one big class EVERYONE has to react to it, and if someone misses that one post then the scene gets weird, and asking everyone to read every post in this RP, which is looking to be huge both player and post wise (none of the posts so far are less than two good sized paragraphs long) is a bit demanding. I'd rather only need to focus on a few other players at a time, personally.