Hello,
I know EA is aware of the AI issue in wet conditions and working on a fix, and I'm glad to hear that. But until a solution is found, we are left with a broken part of the game. Races with changing conditions are especially unplayable. You can be 1-2 second faster on dry track, but when the rain hits, you can suddenly get 4 seconds slower.
So, until a patch is released on this matter, please consider giving us an option to disable wet conditions in Career Mode. Otherwise it's getting to a point where I no longer want to race in wet conditions and skip them entirely.