No critic voices? Here is mine:
I just can belive that the lean forward/back in manual mode works, becose there is no camera move, so no visual feedback, and I dont "feel" any change. Just when I'm staying, bike moves a bit.
There is not big difference between of traction help is on/off. Is not possible get front wheel in the air and go on rear wheel.
I think that there could be any progress of breaking (or percentge of pressure), when break help is turned off.
My best times are from laps when I crashed.

Everytime I'm going anti-clockwise and than I turn back, I can see this bug.
I think that the feeling of speed could be better too.
And finally, what I'm missing mostly is a force feedback.
I think GP bikes is good beta version of the game. It could be good bike simulator in the future. For me, the best bike simulation remains Superbikes 2001.