Anixtu - I think the point is that if the recruiting was in house, the criteria would be guidance, not rules. Dark Falcon's point seems valid to me.
I don't think changing who implements the rules in the application process (and they would be rules) would make a huge difference. Where a candidate has exceptional qualities that make a waiver to the rules desirable there is currently scope for such waivers, for a variety of reasons. I'm not deeply involved in that area, but I guess it would be service operated AFCOs leading on requesting waivers, and I know it is Directorate of Manning (Army) (i.e. the owner of Army personnel and recruitment policies) deciding on waivers.