"K-All assured us when Upton was acquired that he was great, just great. "

Nope.  Certainly thought he'd be better than he was, though.  He was very bad. There's a wide gulf between that and "great".

I wouldn't expect him to be that bad next year, but I also wouldn't expect him to be a full-time player. They are barely paying him anything (Jays are on the hook for $1M next year) so there's no pressure to run him out there every day.