I think once healthy, we roll:
Fox
DDV
Holiday
Barnes
Sabonis
with
Mitchell
Lamb
Harkless
Metu/Lyles
Holmes
as your 10 man rotation. And you still have Jackson/Metu (or Lyles)/Jones/Len as your even deeper bench options. I think it makes more sense to start DDV for now since you can swing him to the 3 in smaller Fox/Mitchell/DDV lineups and Mitchell is obviously better suited to handle a primary ball-handler role for the bench.
Serious influx of talent, length and defense on the wing in particular. Impressive.