Okay, I read all the posts and the replies by the OP. The first thing that immediately came to mind "PERSONAL RESPONSIBILLITY". Eight years after the coach was built, seven years outside the warranty and six years old when you bought it, you're looking for someone to blame for a product that wore out. You didn't buy a Prevost, you bought an entry level coach that comes with a disclaimer that says, the furniture is not designed for full time use, meaning it wont stand up like the stuff you buy for your house.
As to the tag stating there is a penalty for removal, that applies to everyone, but the owner of the product. I can remove any tag I want on my personal property. The penalty refers to someone selling the product, not the buyer.
A few years back this issue arose when Newmar changed over from Flexsteel to Villa. The seats all started flaking. The battle brewed and the blame game started. Newmar ADMITTED that they went with the cheaper material and it wasn't Villa's fault. Newmar also stepped up and paid for all of the affected units to be reupholstered. The issue arose in the first year of ownership.
It's almost embarrassing how far you've gone to alleged that you've been deceived. When people tell you that after eight years, you're out of luck, you keep coming up with reasons why you were cheated. You bought an entry level coach and expect premium, high end materials.....how unusual.
The material performed well for six years, it's wearing out. If the seats really bother you, spend the money and get them recovered and stop trying to blame everyone else in society, you'll live longer!