Mirroring and linking is IMHO an extremely powerful feature. Although not unique to Legend, combined with other Legend features it makes some intriguing workflows possible.
This is a feature request to be able to (using the command palette or shortcut key) "copy" the meta data necessary to mirror or link. The user can then navigate to the desired location and "paste", effectively creating the mirror or link explicitly from the copied information.
Why this matters: This feature would enable the following:
The ability to link / mirror various items at once.
The ability to link / mirror an explicit item while the user is in source context, rather than trying to locate it later while in the target context.