I hate this routine: 1. Set an AI difficulty level 2. Race. 3. Damn, they're all too fast. 4. Reduce AI difficulty level. 5. Race. 6. Damn, they're all too slow. 7. Repeat for each mod/track/car I would like if the game could recommend an AI difficulty based on your laptimes, or PB, or something similar, and also based on whether you want to be near the back, middle or front in the pack of AI.
I fully agree that would be great. A less satisfactory solution would be to allow the user to control the AI difficulty level in the race mode and even 'simulate' the AI against that setting with rF2 outputting the average AI lap time. This way we could do a lap, run a few simulations and then get back on track.