Thanks friend. Will give this a shot and report back...
Before I do, I'd like to ask if you are aware if any of those packages from Snap/Flat would contain anything my base OS installation needs or wants; to make it operate more smoothly in any way or some other dependency-related reason?
For instance; sure, a Snap/Flat package would want to install latest version of which they're aware. Would those versions contain anything mindblowingly different than the version which Zorin wants to install?
The above would be great if the concern were only about notifications to update. If there are differences, how different to Zorin's would they be and would there be any benefit to updating a Snap/Flat package over the same Zorin-related package from Software Updater/repos.