QDMA works, but I can't imagine how it would work on such a large landscape. Deer with poor genetics have to be culled from the herd as well as keeping the Doe to Buck ratio healthy. But most importantly antler restrictions help insure an even distribution of Buck ages. Often in heavy hunted areas all the bucks left are yearlings leaving no mature good genetics (that are proven) to breed.
One reason Western Ky has such big bucks is because of the ample supply of food. Tons of cropland, soy beans, corn, etc.
I think the 2 buck limit is trying to preserve some of the buck population without dealing with the PR nightmare of trying to install a system with antler minimums.
TWRA certainly doesn't make decisions based on the best management of the animals. Simply see the wild hog fiasco