Not sure he is what we need. More of a PF/C than a PF/SF similar to Horford. Better than Kornet I suppose.
And really more of a PF than a C. More of a one position guy. Does not have the shot-blocking / rim protection of a center. Better when he plays alongside a true center.
If we were going to spend a first on someone, I'd rather it be someone with a more divergent skill-set than the current guys. An athletic SF/PF. Not a much worse version of a guy who currently performs ths same role (Horford).