Makes a lot of sense to me. Essentially nothing is (or was) really curated by a topic. Thanks for clarifying.
As a reader, I do like to search and read by topic so that categorization (even if it has nothing to do with curation) is valuable. In that case, I hope tags remain.
Also, I'd love to see a breakdown of member vs non member read time as read time is an interesting proxy for quality in my mind as well as stats around how many non-members read my stories and converted to members.