If Walker improves a modest amount offensively he's really an incredible player, but that modest improvement seems distant unless hes surrounded by elite talent.
Walker needs to grow a bit of a snarl as a man to be an excellent NBA big. He's the pleasant whyte boi on the court that intimidates no one.
No kiddie tours this Summer. Have him work with a martial arts trainer who bloodies his nose a couple times and pisses him off. He needs an edge or he'll remain a career backup Big.