[Matt Devo]

Resurrecting this ancient bit of the thread, I'm actually going to get the update done now. #ProcrastinationFTW

While I'm at it, I'm also going to upgrade to a larger SDD. I believe the steps should be:
1) from Ubuntu, open a terminal and run the EZ Setup Script again.
2) Update the firmware,
3) power down,
4) REPLACE SDD HERE
5) boot up the LibreELEC install media,
6) and off you go -- PROFIT!!

Is that the proper place to do the drive replacement?

 yes

Additionally, for "Obviously you'll want to back up your Kodi userdata" I'm planning on copying this to the same USB stick with the install media. Is the complete library stored in "userdata"? I've had a number of occasions to Export/Import the library and have never had any success with the import process - I always end up having to have it rescrape everything and lose all my "watched" flags. This was back in XBMC days, so things may have improved greatly since then.

Thanks again for all your efforts and support! 

honestly I don't have any experience migrating from a non-LE setup to an LE one. I know there are addons that help with it though.