Class A vs Class IdontcareB should have been skipped. Doesn't do anything to move the plot forward, the entire thing seems like a filler arc. As a Boku no hero fan who only watches the anime I'm very disappointed because this feels pretty much like a wasted season and I'll have to wait a lot for the next one.
They have gone through much better training arcs in past seasons, not everything has to be high stakes but going with no stakes for an entire arc is just mind-boggling to me.
And as a wise man once said: If you don't like my opinion about this show, that's fine. Go like what you like.