Monaco Montclair 29PBT - Beautiful!!! Need to link that to Signature - WOW!
I pulled up the Brochure. If the pictures showing Colors are of a 29PBT (and yours is beautiful in Eclipse!) then the rear wheel wells are under the Fridge and Shower on Passenger Side, Stove and Lavatory on Driver side. I maintain that's why the rear axle's overloaded. In the side view pic, the "house" (not counting the fairing over the Cab) appears "balanced" on the rear axle. A little more wheelbase would shift the balance forward, but then the wheel wells would interfere with the Floor Plan. They find a spot where the floor doesn't need to be flat all the way out to the walls.
It's gonna be hard to shift much weight forward. With the two slides forward, it surprises me the front axle weight isn't higher, though. Just don't load heavy under the bed. You haven't said it doesn't drive well. If it's a handful to keep "in lane" I'd suggest aligning the front end to at least 5-deg of CASTER and adding a rear track bar.