The non-registering clicks thing, yes.
The rest...are likely just preference issues, difference in features, and intended behavior. Such as the lack of keyboard shortcuts in the alt-space menu.
Most can probably be dealt with in one way or another. It's just going to be time consuming to go dig and find out how to make the OS stay out of my way. I'll likely be going back to 16.04 soon until 18.04 gets a little more baked.
It looks like I can get Wayland with 18.04[1], so I may try that first.
[1] https://askubuntu.com/questions/1029436/enable-fractional-sc...
That describes the state of ubuntu these days. More often than not when you get an issue you can find a bug report for it to and the bug report was opened 3 versions ago, never addressed and closed automatically by a bot. It seems they've been busy chasing squirrels and ignored the desktop.
My pet peeve with all recent versions (so xorg and wayland) has been user switching not working, but at least 18.04 is the first version that doesn't boot to an unusable resolution.