hylite brings up an important point about the liner integrity....I would suggest taking it to the next logical step...
in the Beneteau 36CC, that floor liner is then tied into two "rings" if you will - the fore one supports the fore peak door frame and tabbing as well as the deck assembly, the aft one supports the head door and the passage to the aft cabin door as well as the aft part of the center cockpit deck assembly. Since the 361 used the same hull as the 36CC, I would think a similar setup was used there, as well as the other Marion built boats. Check.
So, what does all this mean...if the bilge/floor liner adhesion to the outer hull has been compromised at those key places, more than likely so has the integrity of the bulkheads and those things they support.
If you look at the 36CC/361 liner it looks like a cupcake pan...more cutout than structure. So speak with the factory and an up to Beneteau surveyor...
all the best