I love the feeling of the transition from dirt to tarmac at Eiger - it feels fantastic with a steering wheel - what a shame we only have one track with that transition. I would absolutely love proper Rallycross tracks - preferably Brands Hatch and Lydden Hill. To go with them the Group B Cars would need to be upgraded to premium and be tunable to ridiculous levels - Pat Dorans RS200 had over 900bhp! Ideally we also get the Metro 6R4 Will Gollop rallycross car.
It would be easy to implement this and so enjoyable.