I would like the ability to create, assign and manage sprints within a release, and link features to the sprint. Currently, I set sprints up as Phases within a release to do this. The issues with this workaround are:
I cannot link a Phase from Aha! to a Sprint in Jira
I cannot move a Phase from one Release to another via drag & drop. So if I need to move a sprint to a different release, I have to delete the Phase from one release, re-create it as a phase under the new release, and then link features to this new Phase.