As I said, I'd rather keep Theis moving forward, but I wouldn't move either of them this year as no one you bring in for either of them is going to move the needle more then them anyway.
And I'm really confused why people thought Thompson was a great defender. He has never been a great defender. He isn't bad, but he isn't some great defender. He also isn't a rim protector and never has been one. He is strong and can defend both big true centers and faster PF type big men, so he has that versatility, but he isn't great doing any of it. A nice solid defender that rebounds well is useful, but when that guy is a terrible offensive player, he is nothing more than a role player. There is a reason the Cavs had no real interest in bringing him back. He just isn't going to move the needle at all.