Sims are just too slow to go to Class and end up being too late often so with this Mod they get a hidden Buff which let's them run a bit faster to Class. The Buff last 25 Minutes which should be long enough.
Roommates will be less likely to flood dorms with meals. They'll also bring medium sized meals and different food dishes (no lobster). There's a second package that reduces the likelihood of roomates leaving garbage everywhere.
This is caused by several different pieces of data in the newly added neighborhood stories segment of the save file that are invalid. I was able to track it down to specific sims carrying the bad data, but unfortunately there's no convenient way for players to locate them.