True the MTW front suspension gives a falling spring rate geometry as designed by MMC. The original SUPLEX (they also supply the 4 wheeler springs) dampers had a component that looked like a long progressive bump stop on the damper rod to give a significant rising rate, they also had an internal rebound spring to increase roll stiffness - the current production uses SPAX that has no such rising rate and no internal rebound spring - hence the worse handling and more roll. Theres progress for you - PJB.
As Graham has said, good to see you on TM Peter.
My M3W has just come back from the Works, and on the some 110 mile journey back home the steering seems to have been transformed. I believe it has had a new steering rack fitted and whereas before, I was getting quite violent kick-back after hitting a pothole or rough stretches of road now it is much smoother and whilst the issue has not completely gone away, it is much reduced both in intensity and duration.
Unfortunately I do not have the mechanical knowledge that some of the other posters here have on suspension systems, so do not know if this is also partly down to the revised stronger suspension that has also been fitted?
Whatever it is the handling of the car has been transformed and combined with a much quieter bevel box, I really enjoyed the drive back.

Cheers
Brian