Icarus
I have just tried rfactor 2 for the first time and there is almost no FFB at all. What Thrustmaster control panel settings does this game require? And do any TX/T300 users have some settings I can try? 
The Civic is a Front wheel driven car, so yes it has to feel different. The feeling that it turns by itself if you are on throttle is called "torque steering".OK, I have set my wheel settings to:
Overall strength of all forces 100%
Constant 100%
Periodic 100%
Spring 0%
Damper 0%
FFB Minimum Torque to 1.5. The Camaro GT3, Porsche flat6 and Corvette GT2 feel pretty good. The Civic feels good but there is too much difference between cornering (which feels great) and acceleration which feels too light. Upping the minimum FFB torque didn't seem to fix this, maybe it's supposed to feel this way? And from a standstill the steering is way too heavy, it's ok when I'm moving.
One problem I have is the Formula Renault 2014 and the Civic seem to want to turn in by themselves, almost like the FFB reverses.
The Civic is a Front wheel driven car, so yes it has to feel different. The feeling that it turns by itself if you are on throttle is called "torque steering".
https://en.m.wikipedia.org/wiki/Torque_steering
Also heavy FFB while standing still is correct. Try turning the wheel in your real car when standing still, if your car has power steering turn the motor off.