We aren't involved with the remaster, which is being done by Sperasoft while we focus on creating a new Saints Row game. It's our understanding though that the remaster is visual only. No new features, items, or other content.
While we can't comment yet on platforms, it's always great to hear from one of our players that was there with us since the beginning of the series in 2006.
We always appreciate feedback and suggestions, but radio songs are one of those contractual things involving an external agency and labels rather than individual songs (unless it's for something special like a mission.)