Hi Kristine,
Regarding the post feed, here is my suggestion for Pinned Posts. Very simple, but very useful. It would allow us to keep long-term / evergreen posts at the top of the feed. We would use it for an index for all of the posts on a given topic. We assign a tag to all the related posts (e.g. Tutorials), and assign the same tag to a post which has an index to all the other posts. I would imagine there are lots of creators with this use case.
Cheers,
Andrew