a one-way takes the twitchyness out of the car and reduces its tendency to spin when coming off throttle. This is a problem on CS cars where cos the rear wheels drive faster the car always wants to slide sideways, even when you dont want it.
With a one-way, the front wheels are allowed to coast freely when off throttle, thereby (IMO) they can closer match the speed of the rear rather than forced to spin slower. So the car is better drift machine & less of an animal.
This is somewhat like a real modern 4wd car which has a variable transmission that changes the drive to the front and rear on an ongoing basis. A locked transmission, other than 50 50 on a real car would never work as it would chew up the rear tyres and causing other unwanted wear.
Any other opinions welcome