I agree that the wood in the floor has not been a concern. Of course, the oldest Escape is still young by the standards of moulded fiberglass travel trailers, so it will a many years before we really know. My ancient Boler has a plywood floor, and has no floor issues.
The reason for a different floor construction for me would be to gain insulation. A cored composite floor (as Escape is doing in increasing amounts in the roof area, for strength with an insulation side-effect) would be nice, but would sacrifice a bit of headroom, so would be best reserved for the 5.0TA, or for a major revision of other models involving an increase in the height of the shell.
