The steering deadzone in F1RS is way to much,this is a problem caused be the win95 contol deadzone being set to 15% to help the small movement to joysticks.
If you go to http://www.racesimcentral.net/ there is a win95 program to readuce the deadzone ,I have mine set on 1(default in win95 is 5) this makes the steering very direct(only good for steering wheels)also makes the pedals more direct.
If you play around with the sensetivity settings for the controllers ,and do lots of pratice ,then the sim feels great.
Rember though that you have 750bhp at your feet,with carbon brakes,so you will need to learn to drive better than Gp2 if you don`t want to lock your brakes or spin the wheels at low speeds.
But these mods do help at lot.