Gonna post here more or less the same thing I said in the ac forums about this car:
Okay finally tried it at Silverstone with the G27. 100% gain (80% car setup), 0 min.force, 0 filter, 0 road kerb road effects. Then logitech profiler: 100%, 0 spring damper centering spring. Using the STD car spec, idk which is the recommended for this track.
This is uncanny! I played several times the fr 3.5 in rf2 demo and it just is pretty similar. Could feel plenty of bumps, steering got lighter and heavier in similar places, tendencies to slide/actually slide or spin/under-over steer in similar places. I used Green track in AC and pulling out of the pits I felt those small bumps in that section before the low speed turn in AC and rF2.
Spa on the other hand.. must be the smoothest track for Formula cars. But it depends on the car you're driving and road conditions. Zandvoort with formula abarth is so bumpy in many places.. then driving a GT car you don't notice the same details of the road.
ps. Spa can be felt better with these settings + 107% in logitech (see last paragraph), first time I tried it I had not so optimized ffb settings, but 80% game ffb is bit too high for spa, so go max 75 in this track.
When people call a sim lifeless on the steering/ffb, I noticed is because they drive a lot in understeer style. When you're doing that, you just feel a more constant spring force on the steering because you're basically doing uniform inputs by keeping the wheel turned uniformly in one direction. But try to balance the under-over steer in a corner, with the FR 3.5 at Silverstone (maybe with green track) and there is the steering-ffb life. Very well done, can feel well the rubber of the tires from this car. I lost control and spun out or went off road in similar places between rf2 and ac, but not just that, the actual driving technique and fear of losing the car, and road bumps are there in both games.
I tried 0 min.force because in rf2 also use 0 min.force without going into the files. I think with 107% overall forces in logitech profiler g27 + the settings I described above, I think it can give you a better feeling in slower speed corners. But still doesn't give you the right to go hard on the throttle at lower speeds and corner exits
So just avoid going into under steering in corners and you'll see the ffb life while you're trying to balance it because watching real life onboard videos of this car, the driver usually doesn't get into understeer in corners, so that's why you see him doing small corrections side to side to balance the car.