https://www.touringcartimes.com/2017...nd-brake-wear/
TCR Balance of Performance changed to improve tyre and brake wear
I think that biggest problem in modern touring car classes (TCR, WTCC, BTCC) is the weight.
BTCC is 1280, WTCC is 1100, TCR 1285.
Quick search showed that Group A Jaguar XJS was 1400kg, and Rover 3500 was 1100kg, and they are much bigger cars then these hot hatch models.
In my opinion old ST rules with 975-1000kg minimum weight are perfect. And then apply BOP.
If it's possible to get these modern cars down to sub 1000kg