Got a PM from Coffee Grinder. Will post that information here for everyone:
2017 - 5900 miles. I expected it to ride rougher than a diesel but would like to improve it if possible So, we are dealing with a new chassis/coach.
First question: have you weighed it (individual wheel positions best/axles next best) and set tire pressure according to tire manufacturer's recommendation for that weight? If you are 20 PSI over-inflated, there is no aftermarket device that will give you a smooth ride.
If the front axle is underloaded (lower percent of GAWR on it than the rear axle) move any weight you can forward. A leaf spring that is well-underloaded WILL give a stiff ride.
Next upgrade I would consider would be to replace shocks with Koni FSD's. Yes, they are expensive, but both (yes both) give a softer ride and better handling. That is what two sets of valves in a shock do for you.
