Over 50% of the cars are good as they are in my opinion, but my installed version is quite new, maybe they adjusted some. Different strengths in FFB
can be there for a reason, like caster or scrub radius (like in "some have a heavy steering feel, others give almost to feedback in real life), it's more a philosophical question then. I wouldn't say that holds true for how AC handles FFB, so fine tune away, but I'd keep the global sliders as they are and maybe just adjust understeer and steering rack a little bit.
Edit: Kunos
do actually simulate non-linear power steering in a primitive fashion.
Yes, you can set the time the tire squeal sets in. The default is too early in my opinion and gives you the impression of tire lock when they are still rolling.
It's different per track, but I agree that at some ToD, the track can look really boring. Never as bad as pCARS at high noon and clear conditions though.
Here I actually disagree. They changed the clutch modeling and torque and it's great as it is, if you have set up your H-pattern drivers to some sporty short gear-change distances/ways. What is bad is low-rev-low-throttle fast-clutch in, but AMS is the only sim that is giving a fuck about that so far (not sure about iRacing though).
100% the right way to do it and SUPER important.
more level, yes, but my opinion about the seat position: Imagine the entire car from where the cockpit is on your screen going into your living room (or wherever you are playing) and set the seat position so that the front tires are at the right, natural feeling distance to where you are sitting/playing from. It makes judging your turn-in point in sharp corners a lot easier.
Edit:
FOV calculator. Might also be good under the tuning guide in the OP.
If you know better calculators, let me know, I'm interested.