We too just bought a gas class A two weeks ago. 33’ F53 chassis. Have put 1100 miles on it in that time. Sure is different. But after getting used to it, I enjoy driving it! When We get home, and I first get in my truck, I feel claustrophobic lol. Yes, there is quite a bit of motion to get used to, but to me rough road sections are by far worse than the swaying. We ran a section of I-90 westbound on the downhill side that just about rattled my teeth out. But when the road is smooth, and there is little wind, or the wind is at your tail it was very comfortable in that big old leather lounger seat! I don’t think there’s any thing I can do about rough roads ( Hey, I pay my taxes don’t I)! But if I can improve something easy enough, I’ll do it, so my plan as of now is next spring I’ll add a heavy sway bar in the rear, and do the CHF in the front with Hellwig adjustable end links, and poly bushings and go from there. Probably do a steering stabilizer as well.
To the OP, hang in there, and take it easy. You’ll get it.
To those of you with DP’s and air suspension; your blessed, and we’ll probably never know. For now, I just gotta dance with the girl I brought to the prom!