I, too, must disagree (and agree with TNT, yikes)
KD's jumper is predicated in large part on his ability to drive. Even at 7' I think if he can't explode to the basket anymore, you can more effectively play defense against him. The question is whether, if he loses half a step, is KD still that much better than the other tall dudes that'd guard him that he still ends up fast enough to create his jumper.