He played well in isolated spurts but was pretty ineffective overall, especially offensively. With a new coach and changes to the team, who knows how he'll play this year, but not many folks were very impressed with his play last year....
Basically right. Hart didn't turn out as he was thought to be, and obviously wasn't a fit in Adelman's system.
If Hart stays around, he'll be used sometimes as a tenacious team-playing guard off the bench. Would add extra depth in relation to pressure defense as well.