@NuvolarixPersonally i think this might be okay if the tyre temp system would be as severe as it should have been.. This would make a C3 at 50% faster than a C5 at 50% and also a overheated intermediate after a few laps way slower than a C1..
Instead of only losing 1% grip while overheating C5s by 20° it should rather be it should rather be close to 3%.. for inters it would obviously overheat considerably more but actually does already cost quite a few seconds on a high speed track like Qatar when they get to 130° ending up 3-4 seconds per lap slower than C1s