I have just driven my early m3w, circa 200th back from the dealer folling the 2014 upgrades
The comfort steering is great imho. It is slightly lighter and feels sort of meta stable in my hands so will turn with ease at city speeds. I can see why they call it comfort steering pack surrender (dont want to upset some people)

The centra drive was also done along with the bevel box. The force of engine breaking is substantially reduced. Hence the overall transmission is greatly improved. The car generally feels great. Will get used to the fan installation ugly but unobtrusive to the driver when behind the wheel.
Despite my initial joy things were soon dampened.
At low speeds and under harsh acceleration ie at high torque, there is a clunking noise.
Is this normal for the centra compensator performong its function or does it mean the belt is slipping (unlikely)?