One of the things that's difficult when designing a CMS that works for both digital and print is that there are far fewer space constraints online than in print, and you want to ultimately generate an article that works in both formats. (Oh, and on mobile, and in a condensed version in a sister publication, and an expanded version for the wire.)
For hard news, the inverted pyramid format comes in handy -- if you don't have enough space in the print edition, you just lop off the last few paragraphs -- but for things like op/eds and magazine-style pieces, that doesn't always work.
What I'd love to see is a CMS (and, more fundamentally, a way of representing the underlying data) in which writers and editors can designate certain paragraphs or sentences or phrases as more important than others, so that even a story with a complex format can be dynamically "scaled," sort of like what web designers do with media queries, or what image editors do with seam carving.