'crawled - not currently indexed' is not a neutral rating of content. It means that Google finds the content unfit to be in its indexed. i.e. there is something wrong with it. This does not just affect the page, but also the site. Therefore IMHO this should be avoided.
In regards to broken feeds, I have sent you examples.
I do think that external feeds are very useful as long as there is content and also recent content.
I dont think a feed should be exposed for something that has 1 entry from 2006.
I do not want to have RSS feeds exposed for things that will never result in content.
I dont want to provide feeds for exotic categories. But I do want to provide feeds for area's, categories with a lot of entries, global. Because that makes sense. I want to only provide useful feeds. For everything else we already have PUSH, email, alerts if they watch the content.
Please consider if settings can be added so that we can tweak it to our liking.