I have a 2001 "pre rollover" and hated the couch bed storage combo. Dang thing was a pain to access, took up a lot of floor space but the bed function did work well. It was a stupid simple design that would be very easy to replicate.
I ended up taking it out and making my own side dinette...
Do you have a pic of your side dinette? Did you keep any type of couch/bed design with your side dinette? I'm in agreement with you about the pre-rollover couch design as I have a 2001 and struggle with it all the time. It's good for storage but hard to access because the long cushion lid must be raised each time I get into it. It probably works fine for single people, but with two people and gear or clothes that get stacked on the cushion it can be a big hassle.
I'm thinking about cutting up the bench into several sections with separate cushions so table can be in center section but can also be used to assemble a flat couch/bed that mimicks existing dimensions. We enjoy stretching out on the couch when relaxing in rainy and cold weather, but I think the current pre-rollover design could be made to be more versatile and functional. I bought a Lagun table support, so it's just a matter of changing the current couch and seating config.