When I bought my new Laptop I just happened to think of this very solution using a Macrium recovery USB I created and the after testing/restoring the created image it will indeed restore the Laptop to its "Factory Shipped state", As a bonus if you ever sell or give away your machine it is...
Still waiting to see if the new Start Menu features show up in "Feature Flags" as a Controlled Feature Roll out from the last build otherwise the upgrade was successful.
@Brink After a couple of restarts "Alternate taskbar positions" and the "Consistent solid (donut) spinners across key Windows scenarios" and maybe some others showed up in "Feature Flags"
Update after some more restarts and checking "Feature Flags" again I now also have "Smaller Taskbar" and...
@PerpetualCycle I missed that post as I didn't go back that far in the thread when looking for solutions, it would have saved me a lot of troubleshooting and a couple of posts had i known. (y)
I finally figured out why I had no "VPN" Button in the Toolbar as I had all of the "Firefox Data Collection and Use" options unchecked, As soon as checked the option (Shown Below) the "VPN" Button in the Toolbar became available and I can then enable the free VPN if I want.