A dedicated page for all key user activities aggregated from user selectable “spaces”. What type of activities get listed can be configurable. Any @mentions should be highlighted too in this activity feed.
Yes, if this is not already planned, essential, I agree. Without any “floating box” or other confirmation when an entity is created, this becomes one of the remaining ways to track down that entity if a user is not able to find right away the location of the recently-created entity