I like the idea, but I think an integrated parameter list editor that is able to edit multiple parameters (cells/items) at once would be a lot easier to work with. Simply because you keep context?
You can already extract XML of the automation envelopes from the song files. However it's not easy to keep context when not hearing the actual result. A CSV export of 5 nodes will look something like this:
Changes would be pretty hard to imagine without hearing does changes in context.