Currently with the "share calendar" feature that allows other people to see your availability, you can only share one calendar individually. For example, if you have a Work calendar and a Personal calendar, you would have to create two different share links/invites, and they would be viewed separately by the other person. It would be nice to be able to have one link I can give that shows events from all selected calendars, either as full details or just the more private "event scheduled" block.

Either that, or being able to create a calendar that automatically inherits events from other calendars, including new ones.