I am a big fan of multiple ballhandlers and creators, but let's look at the backcourt rotation.
Buddy- Gunner
TD- Gunner
Mitchell- Gunner
So you're looking at your ball-dominate franchise player, two gunners, and a 3 point specialist who thinks he's a creator. Someone was always going to get shafted. It's honestly too much and too unbalanced. Buddy in theory should work with this backcourt offensively but everyone knows why it doesn't. If we keep the Fox and Hali tandem, then we probably need 3/D guys to round out the backcourt, which Mitchell can be in like the Beverley mold if he curbs the gunner habits.
Davion I need to see more. He's just been so hit or miss with very little consistency on the offensive end. But in those 7-8 games where he's been outstanding, it looks like a glove fit because of how good he is defensively and directly covers the Fox/Hali weakness. And it's worth noting he was up to 11-24 shooting from 3 a 59% TS in 7 December games before going down, so he certainly looked like he could have been figuring it out.
If you stick with Fox, I think you use Buddy/Barnes to balance out the 3/4 spot, or invest in a mini-reset for some future assets to try and draft it. Something like:
Hali || Mitchell
Fox || TD
?? || King?
???|| Metu?
Holmes || Len