Well, it's really easy to look to history to get a fairly good impression on the direction that things will go. Kunos at least has a history of producing very good simulations, in fact NetKar Pro is arguably the best out there in terms of car physics (along side LFS).
I look at SMS's prodigy in creating "simulators". They have a few iterations of NFS Shift under their belt and there's a few staff members that worked on the GTR series. We all know how "sim" NFS Shift was, and the GTR series suffered some fairly obvious flaws in physics (like a lot of sims that seemed to come down the gMotor/ISI legacy chain ).
Particularly the "over the limit" simulation that a lot of simulators just plain don't do well. rFactor, and even iRacing have issues at high slip angles where there are "unrecoverable" slides (where they wouldn't actually be unrecoverable), and in some case the physics engine just craps its pants so bad that it does impossible behaviours.
You can see why I put a bit of "blind" faith into Assetto Corsa. NKP was brilliant, the Assetto Corsa Tech Preview was equally fantastic. I doubt Kunos has, in the span of a few years, forgotten how a car should feel and is instead creating a ******** physics model.
The SMS guys have proven that all they're really good at is those "********" physics models that make a ****-drunk bro feel like Sebastian Vettel (Ironically, those bro-gamers are also about as douchey as Vettel).
