I built a registration process in ClearPass and have it skinned for Ohio State. I'm very happy with this and can share a bit of it offline if you'd like. If ClearPass is used on the wired network as well, it could be a one-stop-shop for you.
As for RF performance, some game devices (e.g., Playstation 4) are only 2.4GHz capable, so be sure that you haven't minimized 2.4GHz to the point that it's insufficient signal for those stations. Remember, airtime is what's most important, so you'll want your 2.4GHz clients to be on and off the air as quickly as possible -- in other words, provide them the highest data rates possible.