I still think the future of a DP's and P2's was inadvertently shown a few years ago by Mazda.
There's a car that showcases brand design language, incorporates innovated technology, could potentially be reduced in cost while still maintaining the majority of it's performance and cost goals, and is an exciting vehicle formula that could seriously entice manufacturers into competition.
Use production-based V6T's, V8's and possibly V10's and you've got a fine racing formula.
I also wish Dr. Panoz would relax his stranglehold on the Deltawing, keep it an open-cockpit, go back to the similar engine formula that was used by Nissan (1.6T), and open the door for more manufacturers to enter the series to showcase their small turbo motors. Hyundai/Kia, Dodge/Fiat, Ford, BMW/Mini, VW, Mazda and more could make small displacement racing turbo engines (based on production units) for a car that looks like nothing else in existence. Larger Diesel engines could also be an option alongside the small gas units.
GTE isn't broken, but Grand Am's GT needs to take the plunge and go full GT3 spec in my opinion. If GTE and GT3 ever end up being replaced by a single spec of cars, then you go to Pro/Pro and Pro/Am racing.
And GX was dead before it was born.