Songs and storytelling are great ideas!
Songs are easy to integrate to the current performance system.
For storytelling, I’d love to see the equivalent to group jams where nearby bards could join in on the story by reciting lines.
I think the main issue is words. They require writers, editors, a bunch of voice actors, translators for localization, a bunch more voice actors.
Stories have to have them; songs don’t absolutely do, but their absence might feel wierd. I really hope your suggestions make it into the game, but I can see why they might not.