I think, because the characters are aging, they are not naturally as funny. Some people continue to have a great sense of comedic timing throughout their life but most of us are just the audience. This arc is good, it is showing how great Luann is as a teacher. She is really helping Vale with his assignment without showing any of what she is thinking, which for her is a real sign of maturity. Yea Luann!
How about an interesting storyline for Luann? It is her story, after all, and she has the most boring life in the strip. These four girls live on campus which is always fun and exciting, Bernice lives at her friends place, which is more interesting than living at home, and rendezvous’s with Nil. It’s time for LUANN to be front and center with a great story.
I’ve heard of a pair of lamps, but a trio….