I would really like the option to schedule when prom is. In my current playthrough my third gen heir had a girlfriend in high school (I don't normally do that but I wanted to see what it was like) and I only wanted them to go to prom right before they aged up, so I said "no" to the prom prompts and they both got a "Disappointed crush didn't ask them to prom" sentiment about each other. There is absolutely no need for them to go to more than one prom. I also think the justification about rotational players sounds like an excuse for it being poorly thought out.
