Exactly what Mitch S said about steering box adjustment.
Besides, just because a “fix” solves a problem, it doesn’t necessarily mean it should be done. All the unintended consequences of “fixes” can be worse in the long run.
The main problem here is that practically all motorhomes are built for comfort during camping, not while going down the road. Occasssionally a new innovative motorhome is built to be the “Porsche” of motorhomes (as one advertised) but they rarely sell well and go out of production.
In my opinion one of the biggest design “issues” is too high center of gravity and center of wind pressure, but as long as buyers prefer tall motorhomes (and for some reason don’t associate poor handling with that), manufacturers will keep building them.