If you are on 5.5.0 it doesn't require the 5.5.1 spoof, if you blocked tagaya servers before the console got notification of a new update.
I'm playing with spoof5.5.0 (not 5.5.1) and with v1.0 (not 1.1) from disc without issue.
If you use Loadiine, then the spoof shouldn't even be required as the game itself doesn't verify the console version with the update version present on the disc (seeing I can connect online with v1.0 and v5.5.0).
It might be different for other games, but xenoblade doesn't care the console and game version for online access.
mario maker disc version requires the spoof to launch the disc and play online.
Loadiine bypass the version check, so there's no need to apply the spoof, but it doesn't work online.
I don't know if launching a disc from loadiine (without SD redirection) will help bypass the spoof requirement but will allow online access.