I think Bagley should come off the bench, especially if Holmes continues to start. Until Bagley proves himself as a passer and defender, his game will slow the half court offense. Off the bench, he and Bogi can dominate the ball on offense, and are surrounded by defense first role players. The same way Ariza is subbed in early now, Bagley can check in for Belly, and get 30 plus minutes a night.
But I think the FO is still old school about starters and depth, the way they built the roster 3 per position.
I predict Bagley will start next to Holmes, and they'll get in each other's way on offense, which is when Dedmond starts again to space the floor.