That's because the AE86 is what created that regulations benchmark lol. The way GT's performance point system works, it'd be nearly impossible to regulate cars if they all were set to 4.55kg/hp p/w ratio, since newer cars, turbo cars, larger engined cars, etc have more PP, which is why I also implemented the PP limit. Plenty of cars are still very competitive even above 5.00kg/hp, just a matter of finding the bright one...for you.
That's messed up. Was that an on the spot thing or were you warned ahead of time? I'm almost certain for that sort of reasoning, they have to give you warning in advance.