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:
_start,_value
353,0.5
353,0.49992125195080389
353,0.49992125195080389
355,0.49992349920731022
355,0.50179584296002255
Changes would be pretty hard to imagine without hearing does changes in context.