Just even in the core fantasy game there are places and obstacles and I have no idea where they belong. I am trying to figure out and organize them and there is just this jumble of cards.

Allowing us to create containers that we can label and drag-and-drop to add or remove cards from will be awesome. The base container can be labeled something like General Card Pool. This option should be available for all cards types for the GM - even natures, strengths, etc