I did get the chance to run a TA car per the rules with the exception of 13.5 lipo. There weren't too many guys at the track one night, so I threw the 13.5 in to race with the regular sedans, VTA tires and all.
To be honest, it was too fast for the tires. I could roll the car around the track, and I was faster than the 21.5 lap times I had done, but it was easy to get the car out of shape. The other cars were also much faster with normal sedan tires. Don't get me wrong, it was a ton of fun, especially when it did a realistic imitation of an overpowered muscle car going into a corner too hot
I just don't think it would be very good for regular racing.