Bell needs to get better defensively. He doesn't need blocks or steals, he needs to play better on ball and help defense. Forget the stats that look cool. Just focus on doing your job on D.
He's 6'7" and can hit over 40% from three, there is a spot for him.
To be fair to him, once we have a better roster as a whole and a better passing team overall, I think he'll naturally be more engaged in rebounding and defense.
You can see teams commit to defense and push each other when they buy in. I don't think we had that this year.