We wanted to add rain but because the real series never runs in the rain, we are not including it.
The only difference for gampad players is that there is a steering aid forced on. All the aids available in the menus are toggleable, and available for both wheel and gamepad. The only aids forced on (for all controller types) are auto-clutch, throttle cut on upshift, and throttle blip on downshift. Hopefully these too will become toggleable with future titles although more work is needed on the transmission model first, and a decision on how to handle stalling.