I disagree, I like him alot and feel like he purposely didn't get alot of minutes bc Donnie wants his value to stay down so he can resign him cheaper.
He can run a pick and roll pretty well and can rebound the ball. He is great depth at the 4 and maybe even some 5, when Jeffries and Curry get tired from lighting it up.
If he got serious minutes I think he could contribute alot more than you think. Look at the Rockets' guys at the 4/5 just to show how important depth is.