I'd drive a lot more on the STCC servers (and TBOs in general) if the XRT was competitive. Being a roadblock isn't always that fun. With the tools we have now I think it is just impossible to balance the cars so that equal drivers in each car could have chance of winning.
I wouldn't mind even if the FXO was over corrected on the next incompatible patch making it the slowest, would make a change at least
Iirc in XRT you get 6 times more points and in RB4 you get 7 times more points than in FXO on STCC servers. Too bad it is harder to finish 7th in XRT than winning in FXO.
Still STCC is doing good job with the limits given by LFS.