I'm not a fan of Legacy games, but I do appreciate that it would be a mechanic that would probably work well with this.
I really enjoy Pandemic Legacy for all its ephemeral glory. But I really think that the board game community can come up with a way to record permanent games-state changes without ripping up proverbial cards...
I agree, that a campaign mode where there are last decisions would be AWESOME! Surely we can achieve this without having to permanently put stickers on our boards?