Koz also probably has better ball skills, or at least is a lot more likely to be a threat driving off of the dribble from the 3 point line than Davis.
KY is committing to running an NBA system, that doesn't prioritize post up skills at the 4 (whereas the college game still prioritize post skills in a 4). The biggest potential benefit I can see from this is it will open up the lane for a guy like Lanier if he is willing to come.
It's a bold move, but I'm willing to see how it works.