The hanger system in eve hasnt seen much change since the beginning of the game. I propose with the most recent expansion moving toward enabling corps and alliances more to create content that we also revisit the hanger system.
Add new facility : Standup Hanger Rental I
Add new feature allowing structures to rent shared hanger space from the owning body. Hangers would vary in size and cost based on the structure settings. After renting one for say a period of a month. A player may assign an access list to it similar to the access lists of Bookmark folders. This would allow the player to use the shared hanger for all of their alts and generate income for the alliance or corporation who owns the structure.
This would alleviate the complexity and confusion around corp hangers and permissions and allow it to simplify to a point that corp hangers can be maintained largely for shared corp projects and not make shift member storage between alts using passwords and cannisters.