The key to watching this show is not taking it 100% seriously, if you do you'll probably cringe a lot.
The story has a lot of plot holes and things that make no sense, but it's still an enjoyable drama; the girls are cute and actually good to be rookies. The drama also helped me identify a lot of BNK48 girls who aren't big/popular within the group.
I also think the final message of The Underclass is very important and mature. I recommend watching it if you're looking for something light hearted and easy going. Don't expect a super smart plot heavy type of story or else you'll end up disappointed in the whole thing.

Also, Meen x Pang should have happened! I'm ok with Tee but this student x teacher dynamic (even though he stopped being his teacher midway upon the show) is not really healthy.. but that's just me.