Exum has shown he can play when he is not broken, which sadly is most of the time. He has looked good with Dallas. Cody has not shown anything close to what Exum did when healthy.
The only hope is Jalen Williams spent more time in college and also had a very slow start in the NBA so we can hope for a similar trajectory.
I think Cody just looks too timid, but you do see a base of skills and size that will likely keep him in the league.
What's his current injury? Osteopetrosis? I was reminded of him today while cleaning some expensive glasses mum bought in Venice.