I'm no QDM junky, but I will agree that in the right environment it could be a definite boon.

But if you shoot a small buck, it has 0% chance of maturing.
If you let it walk, it actually stands a much better chance of surviving "dog" season than you think.

Hunting with hounds reportedly has an even lower success rate than bowhunting does.

Here's another thought too: If you're going to let a deer walk to try and let it mature, why not educate it a little bit to increase its chances? Get its attention, make it look up at you and then throw a rock or something near it? Let it know that it is being hunted! Not that I would do that, but if you're so concerned about "letting them grow" why not help them do it?