Like you I have just installed 13 fresh plus SU then NoWP and huzzah same exact problem. No apps installed just the HTC login then google login in GpE. Bootloops as soon as I switch back to sense forcing nandroid recovery
Yeah, I did notice when going to GPe it upgraded some apps. Then the bootloop when switching back. Stupid me didn't think about doing a backup, will do that. Planning on using tmobile us firmware next, not getting aws lte on Google edition wwe firmware, which I flashed because it had the right cid etc.