To my understanding it will only send power to the front wheels under power just like a normal tt-01. Once throttle is taken off or under brakes it will stop power getting to the front wheels and it will act like a RWD car not a AWD allowing for the car to be able to steer tighter and have a smaller turning circle which in turn makes tighter corners even tighter then it as a AWD.
With the stock shaft or alloy shaft, the front wheels are still trying to make the car go forward not matter what the car is doing whether it would be going in a straight line or turning through corners.
I however have no personal experience with the one way shaft.
I have only raced with a dead stock tt-01 in 27T (and won) so I don't know how it would affect in racing conditions.