I'm an Ole Miss fan and have no issues with his hands. This biggest knocks on him are injury concerns, his agility, and his knowledge of the position. Not many people know this about the offense he was under unless you followed the team. There were no route concepts the past two years under Phil Longo (The OC). Seriously, the guy had a play called "get open". His offense would dominate any bad defense, but any decent defense would shut down his offense because it was so basic. Get Ready Tar Heal fans.
I say that to say any WR from Ole Miss is going to have to learn route concepts all over again. So it will take time. The good news for DK is he really is a hard working player and good guy off the field. So he will put in the time to learn.
I would not take him at #3 overall. Late first or second round. I also think AJ Brown will be slightly better than him.