Don’t think you can win playing Davion, Hali and Fox as 30 min starters. But we shall see what happens when we get to the regular season.
But yes I like what I have seen out of Mitchell.
I think we can. I'm not sure you can win playing Fox, Hali, and Mitchell TOGETHER for 30 minutes, but I think you can play them all 30+ minutes and be a winner. We've seen enough of Davion bodying guys like Lebron, George, and Melo (most of whom play 4, not 3) to know Davion can guard the 3 for some stretches, though I wouldn't want to rely on that as a game long/season long fix. But if you want to close with that lineup, or find 6-8 minutes of a Davion-Hali-Fox lineup, I think you can. And then you can take advantage of those three playing basically all of the 1 and 2 minutes, and mixing and matching them for different looks (I love the differences you get with Fox/Hali compared to Hali/Mitchell, and Fox/Mitchell). But you could role:
1- Fox (32); Mitchell (16)
2- Hali (32); Mitchell (8); Davis (8)
3- Buddy (24); Davis (16); Mitchell (8)
4- Barnes (32); Harkless (16);
5- Holmes (32) TT or Len (16)
Ideally, I think your long term play is try to consolidate Buddy and Bagley (who would not make my rotation) with some draft picks to find a better fit at 3/4, and bump Harkless from the rotation, but again, I think you are rolling a lot of three guard lineups with Davis at the 3:
1- Fox (32); Mitchell (16)
2- Hali (32); Mitchell (8); Davis (8)
3- Future SF (24); Davis (16); Mitchell (8)
4- Barnes (32); Future SF (8); ???? (8- flexible- Davis if you want to play super small, TT if you want to play super big, Metu if you want to find minutes for him; Harkless if he is still around and you prioritize D)
5- Holmes (32); TT/Len (16)
SO I think you can find the minutes for Fox, Hali, Mitchell, Barnes, Holmes, and a future SF to all play 30+ minutes, without having to play Fox, Hali, and Mitchell extended minutes together. That is 6 core 30 minute players, a key reserve in Davis playing 24 minutes, 16 minutes to a backup big, and 8 minutes to play with if you want to get a 9th guy in the rotation (you could also carve 1-2 minutes from other guys here and there to give the 9th guy closer to 16 minutes).