First run of cars (inc ours (#92)) had Suplex spring/damper units (a basic non-adjustable model)...these were switched to Spax after a few months production and the ride height rose as you describe...
Why this was done is a bit of a mystery...esp as it exacerbated the bump-steer issues that then required the comfort-kit etc.
The lower height we have does create other challenges though as ground clearance and departure angle are low.
My understanding is that the Suplex units were specifically developed for the MTW and due to high quality & low volume were expensive, the later Spax type were way cheaper and hence a bit 'cooking grade'
