So one of the things that I keep hearing about is a lack of "adjustability" but IMHO, that is PROBLEM with bringing new people into the hobby. As a parent that also wants to race with my boys do I want to deal with setting up caster, camber, ride height, front and rear diff adjustments, soft front springs, hard rear springs.... Oh, and multiply that by 3 so we can enjoy it as a family!
I truly think that a simple spec rubber tired, whatever body you love, pan car class with retail dollar limits set on electronics (battery, esc, and motor) would get people out to race. Limited adjustments, easier to maintain than TC, charge a battery and race kind of mentality. That would also allow people who's skill, budget, or desire increased to easily move into WGTR where they could play with all of the setup and spend go fast electronics.