Kd is already 30
Which means by the time he fully recovers he"ll be 31-32 which by that time your athletic peak is on the decline, not to mention the Achilles with have slow him down permanently.
What kd is going to have to do is
Gain 25 pounds.
Work on being more of a post player.
Continue to work on his game with his back to the basket.
He needs to go watch film of Dirk Nowitzki because that's who is going to be athletically for the rest of his career, he'll never get that explosiveness, quickeness back. But can still use his height and his body to his atvantage