We thought the Comissary was awful! We won't be returning. We tried Pizza Planet & it was OK - nothing great, but we could return someday if we need to.
I think MGM has the worst food selections of all 4 major parks. Hollywood & Vine at lunch was our meal to eat every trip, but now we don't have that to fall back on anymore, either. We will be there next week & will avoid eating at MGM. We will go on early entry morning & leave the park for lunch.