Well, for an AR hunting rifle platform I would really like an AR. At this point there's really not much more you can do, and I think most companies would rather save the thousands, if not millions, of dollars of R&D costs. As is, we already have AR uppers for .22lr, .223 Remington, .223 Wyld, 5.56x45, 7.62x51, .308 Winchester, .300 AAC Blackout, 6.5 Grendel, and probably a few dozen others that run the gamut from shooting chickens to shooting elk. The rifle has been proven to be effective, in one configuration or another, from ranges out to as far as is feasible to shoot. We don't need a new "AR-type" rifle, we need ARs.
But, sadly, the ARs are bad and scary and evil and the government will not likely ever be convinced otherwise.