Yes, the FFB is perhaps clipping too much with the current settings. This is the steering arm force in a random lap at Interlagos (when the orange line goes above or under the blue lines, the FFB is clipping). Other similar-ish cars like the Stock V8s show way less clipping. Something between 3000 and 3200 sounds reasonable for the realfeel entry (still would have a little bit of clipping in certain corners, but that's
good clipping, unless you have a DD wheel).
Besides the FFB comment, I don't know, I think the car is way planted. I know it has good tyres and downforce and so on, but still...