It may not bother you, but IMO the stock wheel in a Mustang is at least an inch bigger than it needs to be, maybe more. Shrink that down and the perception of 'sportiness' helps you overlook the other shortcomings.
So the rack/steering shaft change is just something they could have fixed in the base S550 but decided not to. I doubt the racks will be swappable since somebody told me you can't do that across GT to GT350 because of the EPAS calibration.
And now it's a fatter, flat bottom bus wheel. Great...