In short: Allow users to copy a MIDI event, then paste it somewhere else in the song as a shared version.
Shared events are a great way to avoid making the same change multiple times; however, in reality, not every shared instance will always occur right after the previous one - for example, if there's a shared loop for each verse, another for each chorus, etc.
Currently, the only way to achieve this is to duplicate an event as shared (which will always place it immediately after), then manually drag & drop that shared event to where it's needed. Cut & paste isn't even an option, because the event stops being shared! This can be a slow & tedious process.
All of this could be avoided if users could copy a MIDI event, then choose to 'Paste as Shared', when required, rather than regular paste. Obviously, this command would work just like regular paste, but make the resulting event shared with the one it was copied from.
Even if there were no shortcut for this, just having it in the right-click menu would be a huge help.