Ok so at first I thought the new fears and wants system would be good. I didn't like that I couldn't dismiss the wants but I decided to give it the benefit of the doubt and play with it on anyway.
Now I just think it's broken. My sim keeps getting the same two fears. Fear of their partner cheating on them which is silly because they currently have like 3 girlfriends. And fear of unfulfilled dreams, also silly because her aspirations are constantly being checked off because I'm attempting to complete all aspirations.
The fears keep giving negative moodlets which is annoying because they slow me down. So I finally gave up and turned them off. I checked the simology panel and the fear traits are gone. So I start playing again and the moodlets are still there, but because the traits are gone I can't deal with her fears so they're there for good now.