Hi, I'm suggesting to make the AI to change to rain tires when rain starts, this can be done by simply reprogram the AI to (in case of rain) change to the compound with highest "WetLatLong" on the car tbc. I don't know if this is the right place to make gameplay suggestions (not saying content that's on the "Third Party Content" forum), so if not please instead of deleting move to the right place. IMO this can improve the simulation experience on tracks like Spa-Francorchamps and Monte Carlo, which offer constant weather changes.
You're racing and starts to rain in the track (roadaxxx material), the AI then make a pitstop, refuel (values according to its HDV file) and change its tires to the compound with higher WetLatLong value in its tbc file (if you want to know what are these values open a rF1 HDV (preferably a S397 one that these lines are explained) and TBC from same car in notepad. The only file that will be affected is the tbc.