Also wanting to make changes.
We have a 2015 Windsport 27k which has the same floor plan. We have been trying to come up with some comfortable options. So far we have replaced the table with one I made out of solid maple. It is shorter, narrower, and lighter than the original. It is still big enough for the two of us while making it easier to get to the couch and increasing the area in the walkway. I'll try to get a picture next time I get to our unit which is in storage.
I never thought about moving the back section out 4", great idea. What did you have to do to make this change? We are looking forward to see what other changes you make. Please update us as you continue your project.