Looking at the Ring brothers' creations, it appears to me that they believe appearance >> performance, so I'm not surprised that they are not fans of TCP.
Well, that's what the Fatman WonderBar system is. He uses the front half of single leaf springs as trailing arms, a Panhard bar to control lateral movement, and Air Ride Shockwaves. I've driven it with regular coilovers and it's OK. The rear of your car rises when you accelerate, which feels weird.
you want the rear end to lift to increase traction. Imagine standing on a scale with a heavy weight in your hands, when you raise the weight above your head fast the lbs on the scale will go up. Same thing with a car, when the rear end lifts, it is putting more pressure on the rear tires of the car to increase traction.