I made a very big mistake getting into this now. I'm slammed with multiple critical projects at the moment and don't have the spare cycles to look into this. I need to get things working again with 6.5 and then circle back and do this update the right way in the not distant future. I guess, truth be told, I am delinquent for not having done this a year or two ago.
There were a few things that didn't work right away. I had gotten most corrected. This was still puzzling me.
I've got several VM's with a "/" in the name. In the older version:
Get-VM ($M.Name).Replace("/", "%2F")
worked nicely but not in 11.2.
It seems as though it should have been a trivial fix but I've run out of time.