If unity works for you why not continue with it? I am on 18.04 with unity here. Fast and smooth, everything just works,
If want to give it a try just do
Code:
sudo apt install ubuntu-unity-desktop
choose lightdm as your default
reboot, log into unity session in the login greeter screen
That's it
If you are using a labtop for certain touchpad functions you need to install the package xserver-xorg-input-synaptics
i have added the
unity7 maintainer ppa but I think it is optional.
The package ubuntu-unity-desktop package pulls in some recommended pkgs like mpv, gnome-mpv and youtube-dl. You can uninstall them later if you don't need them. ( I have tried "sudo apt install --no-install-recommends ubuntu-unity-desktop" but somehow something didn't work, maybe it was my set up, or may be some recommended pkgs are actually needed, so installl the recommends on the safe side)
If all work you can uninstall gnome-shell (or keep it if you wish)
Follow
https://community.ubuntu.com/c/desktop/ubuntu-unity-dev for info,
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