The Asset Publisher query interface has been well extended in 6.0, using Tags, Categories, Scopes, Asset Types etc.
The same functionality would make a lot of sense for the RSS Feed generation (in the Content / WebContent section in ControlPanel), which currently only takes Web Content Articles, filtered by their type. No Tags etc. .
Even though Asset Publisher also provides an RSS feed for the content defined there, RSS feeds still have their own interface and don't require a page with content on them.
Proposed implementation is to "just" unify the "Configuration" section used in Asset Publisher to be used in RSS feeds also.
I guess this calls for taking Feeds out of WebContent where it currently is and have it work for all kinds of assets - basically just what AssetPublisher does.