Its an interesting idea, I think if you had sensors on the track andin the cars then you could control the ESC of a car (when it drove over a track sensor). I thimk for it to work well you would have to dial down the speed of all cars, then driving over a boost would increase the speed to say a normal 380 brushed motor (too fast and you'd just spin out). You could likewise have sensors that slowed down cars and temporarily stopped cars.

BUT,
I think racing with a group of others is already pretty fun.

I could see something like this being feesable in the Tamiya Mini class where speeds are already pretty low.