Will a 24' Class B+ on an E450 Chassis be too rough

I have E450 gearing in my E350 van. Best change I've made. I've also put in 4600# front springs and will probably jump to the newer 5k springs.

The rear springs on the E450 (or even the E350) can be harsh. Overload leafs would make it way worse. I added Sulastic shackles to my rear springs to reduce the harshness. I also have airbags, but I suspect they would not be necessary on a 24' coach (my rear axle weight when towing is a very E450-like 10,000 pounds).