I would rather have a guy like Prince as a vet min than Harris.
I'd be careful about just throwing away Joe Harris.
Summer League/Pre-Season isn't a good time to evaluate because you have a bunch of guys who have practiced about 3 times and who have a lot of individual goals. Guys are fighting to make teams, get noticed, etc.
Joe Harris is capable of being a good shooter. He had some good moments last year.
Just be careful about replacing a guy because of those kind of impressions. Playmaking in meaningless games etc.
We tried that at one time. Remember when Manny Harris had outplayed Danny Green in almost every part of the game ?
I'm not saying Joe Harris is Danny Green. But I am saying throwing away Harris after two Summer League games is not the best idea.