We've both added To-Do's to a feature's requirements and to the feature itself. I want to see a summary of all the To-Do's in a feature AND in a feature's requirements.
Feature-level To-Do's are broader and about resolving the business need, priority, or other question.
Requirements-level To-do's capture work we need to do to finish specifying a requirement. Requirements are our "Definition of Done" for a particular feature.
I'd like to further add to this one that our business would like to roll-up to-do's underneath an initiative. We've incorporated several teams into Aha!, and are using To-Do's associated to both Features and Requirements to task work back and forth (ie, "TODO: Dev - Review Requested" or "TODO: Design - Update Required based on Use-Case". Within an initiative, I'd like the ability to report on all todo's (aka, the work left to complete requirements for the product definition) and their related attributes. Aha! currently lacks this ability as of 3/19/2018 based on Support response, and recommended voting this feature requested from 3 years ago.