I would like to see the ability to set your global RSS feed permissions to a user or usergroup. Right now, the only way to obtain a public global RSS feed is to set your forum wide open to the public. Not all communities, like private or subscriber based forums, want to do this. If you have a private forum, the only way you can get an RSS feed is to log in first. However, this is detrimental if you want your RSS feed to attract traffic from Google, Facebook, Twitter, etc. Hope to see this implemented soon.