Which leads to the next questions. Are there available bigs who improves the defense enough when KG is off the floor to offset KG's decline for next season? If so, can the Celtics acquire one? If so, will that player plus the return of Rondo and Sullinger plus some roster tweaks fix the offense enough to make it at least average?
I'm actually predicting that having a large group of role players returning will lead to continuity that makes the defense better, especially when KG is off the floor.