Do goofballs use only michief interactions in your game? Mine do all the time since latest patch. They don't use any other interaction, not even funny ones.
I like that the trais are very noticeable now. If i want a funny average guy i won't use the goofball trait on him. Or i can use it for storytelling, but i'll switch autonony off, and then i can control my sims to make them do exactly what i imagine them doing.