Regarding the Shortcut for Adding Inline Links:

The [[ syntax feels odd at the moment.

I think it would make sense to use @ instead of [[? This would align with how other platforms provide means of tagging other entities, not just links. Google Workspace for example now uses @ to bring up a menu to insert smart chips. Of course GitHub, Slack, etc use @ for mentioning specific users. Seems @ would be more discoverable than [[. Maybe it could be used a general inline token inserter menu (e.g. images, current date) rather than just for link insertion.