Now for the critique:
It feels more like RC2 than RC1, which isn't good. I already see a lot of players complaining about it being too unforgiving. Don't listen to them. I'm a decent RC1 player and find GRIP way too softcore. After 2 laps I felt like being driven by the wire. I know you have a hard time pleasing all your potential buyers, but you won't please everyone. Focus on one group. You can either go the typical arcade race game way and make a game that will sell fast and get forgotten fast, or you can go the more hardcore way and make another cult classic. Trust the players, many will master a harder game and love it for a long time. Once again: don't try to please everybody, it won't work.
What I feel:
- Not enough acceleration. It seems too real, maybe even slower than Veyron. I want more arcade acceleration.
- Too much understeer. I can really feel that it's a 4x4 car (I own a Subaru) which is good - it means that you can pass the feeling to a player with current physics, but please give more torque to the rear wheels - oversteer is much more fun.
- Inconsistent grip. When turning there's too much grip (and understeer), I want more tendency to drift, model a bit more limited slip differential or something. But then when I accelerate from stop, in the straight line, on sand, there's not enough grip, like on snow almost - the car should use more its jet engines then or something.
- The game is too forgiving. Snuggling to a wall stabilizes the ride instead of bouncing the car off. Crashing into a wall just turns the car a bit and stops it, where's all the kinetic energy? It should bounce up and spin. Don't listen to people who complain about bumps, in RC1 if you didn't know the track enough to avoid bumpy places, you had your car all over the place.
- Sound effects are too quiet. It's crucial to hear your wheels losing grip (and seeing the skid marks) - it provides huge amount of the feel and helps control the car. I don't like the engine sound, it sounds like go-kart. I'd love to hear the sound of turbo spinning. If you don't want to make it jet-like as it was in RC1, make it at least sound powerful, like the burbling sound of boxer engines with unequal length exhaust manifolds, or crossplane V8. Who needs a soundtrack when the engine sounds good? I was playing RC1 without soundtrack most of the time.
- Camera doesn't support the feeling of speed. FoV is too narrow and the FoV effect when accelerating and at high speeds isn't strong enough. Rear wheels cover the view too much, we need to see front wheels better - if they fit between the obstacles, the rear will probably fit too. Perhaps being closer to the ground would help too. Provide several camera positions.