I saw the option on Jayco's site. We recently went to an RV show and I checked out the FG sided Jay Flight. I fist pounded the front of it and it's solid. Our last trailer was a Heartland North Trail and the front cap was not vac bonded. You could push on the Filon and it would compress. It ended up getting some waves in it. Not delam, just some waves from all the expanding and contracting.
JMO but the idea of a vac bonded front and rear would seem to be a better process.
FWIW the rear on that Heartland TT was also free floating and had a couple bubbly spots. Again not delam just pucker stuff.