We were in a somewhat similar boat as you, just over a year ago. Had a 36' Georgetown Class A built on a 2012 F53 V10 chassis. It had served us well over the years, but we were ready to down-size a little, and wanted something that rode better, and (mostly) wanted a better quality coach. We were tired of constantly finding and fixing shoddy construction issues on the Georgetown, and wanted something with better road manners. And, we wanted nothing to do with diesel, for various reasons (mostly the obscene cost).
One look and test drive of a Newmar built on the newer F53 chassis, and we were pretty well sold (see signature). Ford made significant improvements on their F53 chassis in 2020, giving it the newer big block 7.3 V8 engine, stiffer roll bars, better springs, etc. End result is a coach that handles and drives waaaay better than our old Georgetown did. And, as I'm sure you know, Newmar's quality on all their units is amazing, and very hard to beat without spending a lot more $$$.
There is no denying, that a DP chassis will ride better. However, that better ride comes at a very high cost. And, Ford really closed the gap on the DPs with the chassis improvements they made in 2020 on their F53 chassis.
You should definitely find one built on the newer F53 chassis and take it for a test drive. It just might restore your faith somewhat, in gas Motorhomes.