Hello Derekg,
With LL 5.0, there is a new version of CUPS.
Have you try to install your printer/Scanner WITHOUT drivers from Epson site ?
I use a XP-335 and I don't need to load drivers from Epson site and it works correctly under LL 5.0 ; on the test page it is specified "driver : drvless.ppd"
For scanner, don(t forget to stop firewall prior to start SANE.