Not limiting players to a single position, I see it like this:
Fox / Harper / McLaughlin
Vassell / Castle / Harper / Waters / Jones-García / Ingram
Castle / Champagnie / Keldon / Bryant / Minix
Barnes / Sochan / Olynyk / Bryant
Wemby / Kornet / Olynyk
Thoughts:
1. Castle is more of a 3 than Vassell.
2. I bolded 12 players I'd consider potential rotation players, with just Waters, McLaughlin, and the two-way players as depth options. Having 12 legit NBA rotation players is quite the evolution from recent years.
3. Putting some players in multiple positions, it's hard to justify a rotation spot for Keldon. Especially after Bryant gets a bit of seasoning. It's easy to see him as the odd man out as an undersized 3 with poor defense.