There is something that is currently not feasible, and might improve the quality of Writer documents.
Dynamic vertical spacing of paragraphs. Currently, if a paragraph is cut at the end of a page, it can be moved to the next page, but this leave a large blank area at the end of the page.
Instead, the paragraphs on the page could be spaced vertically to fill the page dynamically. This could also work on multiple column, so that all columns end at the same level.
This could be achieved, from the user perspective, with an additional “dynamic” spacing option in the paragraph style.