I would have said Isaiah if he had played more, and I don't think AB was super solid this year. Turner is what he is and that's not an MVP.
I guess I'll go with Kelly Olynyk, There is no real MVP, its clouded by the fact that most players were grouped in the 27-21 minute range (Turner, Smart, Sullinger, IT4, Crowder, Bass, Olynyk, Zeller). The only player still on the roster playing over 30 minutes was Bradley and his TS% of what felt like -100342 at times.
Among that group, only IT (Gaudy 7.3 really would be my MVP if he played more), Smart (2.5), Crowder (2.7) and Olynyk (4.7) had positive Net Ratings which shows what most of us realize that the bench played a huge role.
Olynyk's true shooting percentage of 55.8, 20.8 usage percentage are pretty decent. Yeah he was a turn over magnet but there wasn't really anyone who stood out on this team.
His RRPM was solid for psuedo center. He was a definite mismatch against most bench units, and held his own defensively. He wasn't great by any stretch, but this was the definition of a team. Everyone chipped in til IT got there, I just find it hard to nominate someone that played about a 1/4 of the season for the C's. He's definitely a prime 6th man contender though.
Seems like the real MVP was probably the bench unit that kept the team in games, or Stevens and his usage of all his toys.