Ok I'm gonna confess I kinda hurried in to the decision and bought this, because I saw a thread about unofficial FFB fix on RaceDeparment:
http://www.racedepartment.com/threads/ffb-fixed.104679/
But no, it doesn't fix the ffb. I have driven this for a while now and I can see some potential, but with the current FFB it's impossible to judge the physics really because I can't feel what the car is doing, at all. Biggest problem is that the car doesn't counter steer (caster effect) thru the FFB at all, so I don't know when it's understeering or oversteering.
Codemasters seem to have acknowledged this problem, they mentioned they are working with this in the latest patch notes, so there is some hope.
There are other problems from a simracers POV too, not enough customizations to camera views and controller settings (I can't configure a H-shifter if it isn't the default G27 shifter).
Sounds are fantastic tho, I'm pretty sure that this is the first time I have actually heard a game to be able to deliver a believable representation of the induction note of a N/A 4-cyl engine.
And not just that, every engine I have yet heard sounds spot on. Even a realistical sounding anti-lag is there.