I do believe shocks and... a sway bar would stop some of the throwing of dishes, silver ware and pantry items all over the RV. Don't hear much of this in Motor Home do we. Even Fifth Wheels and Trailers with shocks don't have sway bars.
I think they should. No big project to install one I think, once you determine weight an appropriate sway bar.
Also Air Ride hitches really do help a lot. Going west on I40, when it was like driving on rail road ties or boulder field, back then, we saw a lot of pitching and heaving of Firth Wheels and Trailers.Ours rode smooth. Looking out the rear glass of the F350 we could see the air bag adsorbing the beating from the road.
I bet the shocks were hot too.