I haven’t had enough time to fully play around with Mojave so I can’t write a full review yet. Things have already broken (as expected) and I will be keeping this list updated as I find and fix them:
Subpixel antialiasing workaround (have yet to try this out myself): https://www.reddit.com/r/apple/comments/9inu3e/if_the_font_rendering_on_mojave_looks_odd_to_you/
Missing Safari Extensions (such as uBlock Origin): Once starting up Safari after updating to Mojave you will notice that your extensions are gone. You will also notice trying to install extensions from Preferences > Extensions redirects you to the Mac App Store since Safari extensions are now hosted there. You can still install extensions from the Safari Extensions Gallery website here: https://safari-extensions.apple.com/?category=mostpopular
Recently opened apps added to Dock: You will notice that apps that you haven’t pinned to the Dock are still there even after you close them. This is because the option “Show recent applications in Dock” is now enabled by default. You can turn it off under System Preferences > Dock > Show recent applications in Dock.