Reasonable - the ‘e’ method is by nature temporary and only lasts the single boot.
Though, it will be applied in a less-than-familiar fashion … the grub editor is more basic than even a lot of the terminal text-editors like nano, and the user will of course have had to manually write down the values and all instead of doing a copy/paste from within the comfort of the desktop.
Nothing wrong with that - just mentioning it for the sake of that user (and you since you are helping)
Of interest for you may also be these by the way:
[HowTo] Provide System Information
[HowTo] Resolve an unbootable Manjaro (black screen, login failed, cant boot, etc)
[HowTo] use public command-line pastebin services without installing anything!