I agree with everything here but one small thing: the verification process.
I am a GD player more than a Newgrounds user, and so I can tell that hearing the same overused songs over and over and over and over and over again is pretty annoying. So if only the popular artists are able to get their music to GD, that would mean having even less unknown yet great songs that we would be able to use. I think that a song that's unknown is always fun to listen to and to play/create to.
So I'm asking you if you would take the time to look at more unknown artists and verify them aswell. (Here's an idea: look through the "scouted" people list (if there is one lol) and check if they are good enough to get verified)