Too many variables.
He may be fast and agile for a big ruckman, but it is a different story for KD's. Recovery is also important for KD's and I'm not sure of PJ's ability in this regard.
Considering the trend is towards a power forward close to goals and more agile marking targets across HF who push high up the ground, I can't see who his typical opponent would be.
Maybe if the opposition stacked their forward line with talls (including a ruckman), he could be used on the big, slow ruckman. But the resting ruckman in the forward pocket is something of the past.
Don't think the move would work.