Pretty simple, right now it is kind of a pain to check how many stacks you have, and afaik impossible to tell how long they have left before falling off. Some kind of simple display that indicates both the number of stacks you currently have as well as how many turns until they expire would be of great assistance.

Yes, the expiration date is really needed. It's even worse for the Hissho now than were for the Cravers when the locust points weren't displayed, since if you don't count the turns, you risk losing your whole stack...