Puddles and Dynamic Surfaces

Watching Rally Finland and how the weather has made the stages so challenging and unpredictable. 

The game needs puddles! Aquaplaning! At the moment you can turn on heavy rain and maximum degradation bit all it does is turn grip down generically and create tyre tracks. No puddles, no aquaplaning, no blown out sections.

The drivers have been commenting how unpredictable the stages have been, where there is grip and when then suddenly isn't. 

The game should allow for intermediate weather conditions (as if there had been patchy, on and off rain etc) so the grip levels change throughout a stage. Sections of mud etc.