Really tired of the meta usage and this would be fun and always different and totally make metas irrelevant.
Performance Index limited one-make races that rotate cars daily. You could go almost two years on a daily cycle without cars repeating.
Everybody races the same car, tuning allowed up to a predetermined Performance Index. Tracks rotate like Open Class already does. Cars rotate daily.
Possibly PI limit to change throughout the day but that would complicate it a bit more, but make it a bit more interesting.
This would put an emphasis on tuning and racing skill instead of mindlessly using the meta.