Against decent sized bigs he was basically ineffective. He may start all year, but against better opponents I would expect rose to opt for the younger guys against bigger 4s, especially if KD continues to struggle against lengthier players.
In some games I can see him playing 10 minutes per game. He certainly seemed to become less effective as the season went on. If he developed a few more moves and added some strength, he could be much more effective and may be able to hold off the younger guys.