Epics is a really nice product to replace other management systems.
One feature tough we cannot live without is the changes to a certain story.
Without visiblitity of this, users can just add or change stories that are in a sprint without notice of the product owner or development team.
Yes, also appreciated to add a search funtionality to the team server. This was the case with SVN, but not with Git. It makes it very difficult to track changes of development teams.
I certainly would appreciate this too in Epics.