Interesting. I do recall that the workaround for the V700 in Windows 8, before the drivers were updated, was just to do with tricking the installer.
I think I'm going to clone my boot drive, and have that handy for swapping back in if there are problems, and then do the upgrade. But I'm not doing any of it until a/ I hear some positive reports from braver explorers than I, and b/ until I've got a good clear day where nothing has to be delivered, which might not come up for a while.