New rack

OK, so recently had a new steering rack fitted under warranty, and wanted to drive the car and make sure of the results for a bit before I reported them. 
Had a slight click from the rack, which was only noticeable from outside the car and not heard at all from inside with the door closed. Shaking the wheel from about the 10 o’clock position to the 2 o’clock position produced the click. 
steering itself felt fine while driving and showed no real signs of having an issue. 
Anyway, and to the real outcome that surprised me. 
The rack has a noticeable difference for the better now while steering and feels much more precise in its input. 
But the main difference, is that the rack has completely transformed my suspension. It has gone from the horrendously crashy uncontrolled nonsense that I see reported all the time, to what you would swear under oath was a completely new setup. It is smooth all the time, and covers most road conditions with control and comfort. 
Gone are the brutal knocks and bangs over even the slightest deviation in the road. 
I couldn’t have even considered selecting sport mode before, and now it rides perfectly but with the usual change to travel and roll. 
In conclusion, the only reasoning can be, that the rack issue was having a knock on effect on the suspension settings. Possibly locking it out to a certain level, but without registering an issue and throwing codes or any sign of faults. It’s basically a suspension limp mode. 
thought it was worth mentioning due to others having reported severe suspension knocks and poor control issues with DCC as well.