I know she said she likes Chubby boys but the guy she is with is far past Chubby stages

That's actually a great catch. It seems like the show is focusing more seriously for Mickey's turn around. But we already know Gus goes to rehab and has just as bad of personal issues as well that they never really follow up on. Even though Mickey ends up screwing up her rehab she keeps trying, Gus doesn't do anything…

I agree, I love the show. I love the black guy that works the catering he is hilarious.