I just completed the installation of the final beta this week in VirtualBox (I don’t have a physical test machine) and installed Unity on top of it. So far I’ve only made two observations (and I confess, I didn’t read ALL of the posts above to see if this was already reported).
In 16.04LTS, I had the abillity (via the Unity Tweak Tool) to change the behavior in the launcher so that if I clicked on an icon for a running application, that application would minimize back into the launcher. Clicking it again would restore it to the desktop. That function no longer works in 18.04LTS
Previously, if I right-clicked on the “Files” icon in the launcher, I would get a pop-up menu with a list of specific folders in my home directory (Downloads, Documents, etc) as well as “Open a new window.” That also no longer appears to work.
More as I get myself acquainted. Thanks and keep up the good work!