Ok so my first thoughts. Forcefeedback is pretty amazing but lacks the transitional feel when understeer starts to happen (ie lightening the wheel). But pretty good imo. Hard to judge turn in points, but the cars take predictable behaviors unlike iRacing.
Cockpit views I've tried are very good comparable with iRacing's, unlike LFS where I cannot drive in cockpit.
Not a fan of the shifting motions, dont like how the driver reaches for the knob before I even shift. It's a bit distracting. The digital rev limiter is too low on the screen to use IMO and very hard to read. Nothing major.
Curb physics are shit, and I dont like the autoslow down, would rather be able to drive full speed on grass for fun if I feel like it.
Braking is slightly too sensitive with lock ups. I'm on the CSR Elite load cell pedals, barely push half force and I get uber lock ups. Also the sim lacks a feeling of tire flex IMO.
Still feels better than iRacing and rFactor and I'm sure that AC guys are still fine tuning. Slightly over-arcadish in some of its aspects. But in general not an arcade game at all. Cant wait to see how servers allow for hardcore modes.
I wouldn't recommend it atm because no multiplayer, but once MP is out I would 100% recommend it even with the things I don't like. Can't wait!