Is it broken? From what I can see on an average week there are only a handful of drivers ....
Where have the rest vacated too?
I don't have a problem with being slower than the rest, I have learned the only person your racing really is yourself, for lap times - yielding to faster cars is sensible, but the fact remains a 'hyper' car is very likely to come into contact with a 13.5 powered car on the straight.
A few of the really, really fast cars in that class seem really unpredictable as well, so even if you did try and yield a collision is still likely.
So as regards to fixing it if it is indeed broken - .... "enforce the rules if possible"
If not, let the class be outlaw and free for all, I can't see why anybody would want to run a class where there are not any rules personally, and most drivers would vacate a class where the rules are being broken and cheating exists ... hang on, how many drivers have been racing touring recently?