I’m just hoping for two main things.
That cars can actually follow closely and better overall racing.
That the cars actually look futuristic and closer to the concept art with clean lines and that Brawn and Co. think of all possible loopholes. I don’t want to end up with another step/platypus/dick/thumb nose situation. Better integrated, more stylized/refined halos as well.
Edit> With the nose example, I mean all areas of the car.