Car performance needs more weight
After playing more with the new balance, I still think the car needs to have a bigger influence.
In my current save, Prost has a 100% podium rate and is already pulling away in the championship despite Brabham having the fastest car (95 vs McLaren's 92). Brabham's drivers are only 88 and 84, but a 3-point car advantage should matter more than a 7-point driver advantage.
These are all Formula 1 drivers. An 84-rated driver in the fastest car should still be a regular race winner and championship contender. Driver rating should separate teammates and decide close fights, not consistently overcome a clear car deficit.
I already suggested an 80/20 split before, but after seeing a full save play out, I think the simulation still leans too much toward driver ratings. The fastest car should be the biggest predictor of success over a season.