The bed in most trailers suck. We always use a memory foam topper on ours. It helps. Trading don't likely fix the bed issue.
Many on this forum have traded the sofa for recliners but you lose that sleeping place. A search will Likely net some help there.
As for the burlesque, you need to decide if you like your unit enough to keep the same floor plan or trade up. If your son and his family cone along, you might want to consider a quad bunk trailer or if you want to get a bigger truck, consider a mid bunk fifth wheel. That can net you bunks, rear living with recliners and sofa bed. These tend to be heavy so you will likely need a 1 ton srw to tow that.
2014 Crew Cab Chevy Silverado 3500 4wd Duramax/Allison
2014 Sabre 34REQS-6