If I could ask for a change with Discover University

On the issue of sims maxing out skills, I don't see it as that bad.
Sims are now freed up to do other things with their time.

This is a perfect setup for a hobbies pack.
This would give our sims something else to achieve and hobbies would be a good reliever for negative moods, instead of crying or hiding from the world in their beds.