It would be great to allow for cards (epics, features, requirements) to move in any "card" based view. A great example is Google Keep (Web version on Desktop). Google Keep allows for easy moving of cards and pinning of favorites to the top. Add in the ability to edit a card "in place" - perhaps "squeezing the other cards" out of the way to allow for editing, then more flexibility will be given to users with many cards to manage.