The wheel slip and spin is so bad that if you take a lower powered light car like one of the caterhams and try to start facing up hill it is almost impossible, you will either stall the engine or start sliding sideways with no control. I think it happens in all cars but the low power light ones can even get stuck on tarmac with an incline so are totally beached in any kind of grass or gravel if you come to a stop. You can see the problem in higher power cars sometime of you downshift into too low of a gear and the wheels start spinning that can last 2 or 3 corners even. I guess it's just something that needs tweaking but it makes starting races in some cars almost impossible and a spin on the grass will almost inevitably leave you beached in the lowest powered cater ham for example. Apart from that I'm loving the game, keep up the hard work!