Just migrated from ubuntu 19.04 to elementary and loving it!
One major problem with keyboard shortcuts on elementary is that to set a shortcut for say MUTE (icon listed on F6 Key) i have to use a keyboard combination in settings: Ex - Super + F6. simply pressing f6 to setup a shortcut for mute doesn't work - says - disabled.
This is something that works very well in Ubuntu! (and might force me to move back)