I keep coming back to check the progress on this, and there is none.
Yeah, they add "costumes". Because... reasons?
Look, guys, if I wanted to play dress-up doll, I'd play Sims 4 with Wicked Whims installed. Seriously.
Not to mention that the costumes you put on characters don't show up in sex scenes. Those start and end with the normal school uniforms. So in the end there is zero reason to spend time and effort and resources for those costumes.
I get it, they are easier to make, and you can show some "progress". But we, players, want to see progress in terms of story, character relationship, lewd scenes, not in some lame costume.
If you look at update history, it's all you see. Added costumes / outfits. You are pretty much taking Project Zomboid habit to add one towel color / update.