I just feel that a rival school(s) can get this point across just fine. I like how UA has several departments like Support, Business, etc. But I look at Class B, and can't stop thinking about how redundant they are. It's not even like they're inferior, or older students. They're literally just less popular.
Now with that being said, they exist at the end of the day, so Horikoshi obviously can't ignore them, but I just feel that he didn't have to create them. I hope at least some of them get some decent development in this arc.
Interesting point. You can say Class B mainly exist as (1.) A world-building element, having at least two classes in a hero school makes sense. And, (2.) Making them the constant with which Class A is compared to. You can't show how awesome someone is if there isn't anyone to compare them with.
But, even if that's their main function Hirokoshi can do more with them if he wanted (or is allowed). Even, if its just turning a handful (Tetsutetsu, Kendou, Monoma and few others) into more in-depth characters. This could be Hirokoshi's chance to do just that. Maybe that's why the students I mentioned weren't in the first (aka Shinso fodder) group.
–- Update From New Post Merge ---
My Hero Vigilantes chapter 37 is out!
I don't do a lot of shipping talk, but…
! I'd love it if All Might and Tsukauchi were dating. I just got that vibe during their scenes together. Toshinori's expressions added to it, but that could be explained as the artist drawing style.
! That bit with All Might fighting those random giant creatures was stupid but funny. What? You're not going to investigate that All Might? Just beat them down and go? Okay.
! Mokoto and Tsukauchi's scene was good too. Nice revelation she's been protecting Pop (and Koichi) from her brother.
! And, we get world-building concerning people with usual bodies. I just assumed people were taken care of like the thing with companies having to have clothes for different body types. Is that why so many large body people in the series turn to crime? Do they feel society doesn't treat them fairly? I hope this gets explored more. Having to live in certain locations would hinder your ability to get a job and even what you do is affected. Not like you can go to many indoor places to relax.