That thread's a good one. As noted there, for openers:
What are the Coach's Length and Wheelbase?
What are the Front and Rear Axle Ratings (GAWR) and what are the actual weights per a truck scale?
What are your Tire Pressures?
Ford's position on this? Low REAR ride height? If it's new and low, I'd guess it's close to max axle rating on the rear. That might mean it's light in front, or at least that the front tire pressures could be too high. If you meant the REAR is low, that's more unusual than the rear being high. If the rear is low it might be too soft for the load. If it's too soft for the load, the REAR may wallow and sway. In a FORD chassis, rear sway or rolling causes an unwanted steering action in the front. Hence my questions...
As Bryan aptly mentions, excess front tire pressure can run from annoying to disastrous. Make sure all four rears are inflated to the door sticker pressure. That'd be max load and it's possible that's what's on the rear. The front tires shouldn't be over 60 or 65 and that's for max load. I'd be very surprised from what you're reporting that the front axle is anywhere near max load.