I think he's referring mainly to loose ends with Start Screen (e.g., can't handle some foreign language alphabets) and CCC.
As to Rapture Pro, you may have noticed I didn't post about it when it came out...that's because I didn't use it. However, since the last update, I've been using it more. Not the most elegant instrument in my collection, but I'm finding it increasingly useful. Like Rapture, it does things other instruments can't do.