To really find out what's important in which granularity, we use UserStoryMapping with e.g. storiesonboard.com or feature map.co to determine which feature of an epic/featureset shall be delivered in which release in a lean way.
it would be really awesome and a great experience to have this directly in aha.io, so you'd never have to leave the best tool on earth for agile roadmapping when you're in the creative process :)
User story maps — new in Aha!
We are excited to introduce user story maps in Aha! — now you can define your user's journey and plan how you will improve their experience.