Using reference points like V1, V2, Pre1, Pre2, Ch1, B, etc, etc, allows not just individuals who are working with software to tab they're work for quick wave reference, but it also allows collaborators to "sync" with one another. It identifies changes in lyrics and music. If a collaborator asked me "can you increase dbs or change these lines in A," I'd say, "I have no idea what you're taking about and you need to be more specific."
This also bring about an interesting idea that songwriting processes are no longer limited to sitting down with your guitar and a paper and pencil. Songwriting now, it seems, is beginning to envelope technology and production scheme from the start.