Your mechanic experienced pretty much what I did working on the Jayco. The lines were drooping, they were deteriorated, and it was BARELY possible to reach the tank without dropping. And yes, it fills more easily than it used to. I try to park nose-down at the pumps if I can, but level works. I doubt if I could fill it nose-up.
If God's Your Co-Pilot Move Over, jd
2003 Jayco Escapade 31A on 2002 Ford E450 V10 4R100 218" WB