I feel that way too.
The forcefeedback is strange compared to rfactor and other sims.
And Iulian Cezar, I guess it's related to loss of grip, as people are discussing on the forums, there's a lot of understeer in this game, if you turn your wheel too much, you end up sliding the front, and this is why you feel a "deadzone" at maximum lock, when you don't feel feedback anymore, it's time to turn it back a little to regain traction. This is what I think, not sure if it's true.
Btw, anyone got a nice wheel setup with high value locks? I could only find a decent setup on 264º, but I don't like to play with such a low lock angle, in rFactor for example, I use 375º and it's fine, when I'm doing a hairpin, I can turn the wheel to its maximum lock, just like in real life, and in high speed corners I don't need to turn more than, maybe 15º, this is realistic.
At Montreal's hairpin and monaco, for example, you can see the real life drivers turning the wheel much more than just 90º degrees like you do in this game, even the virtual wheel (the one you see in game) doesn't go further than 90º.