Thank you, WannabeWordsmith. This is excellent information and I appreciate your detailed response very much.
I had assumed/hoped that resubmissions would not feature on front page again or jump to the top of author's profile, but I wasn't sure, so good to have that confirmed.
Some thoughts below, nothing that warrants a reply.
1. That answers my question about the comparative length, thank you.
2. I was curious about the tools moderators had at their disposal when thinking about the time it might take to re-review and whether it takes longer than an initial review. Good to know. Thanks for the tip to use Moderator Note. Amazing that people would be so sneaky!
3. Good to know tags are not included in resubmission workflow. John was good to point this out too. I take your point about choosing tags carefully and not creating new ones willy-nilly. My thoughts about why one might want to edit tags: there is a limit of 10 tags per story and there are a lot of tags that are rough duplicates (similar enough that they may describe content sufficiently), and I guess over time an author may learn which tags readers respond to better than others. But given that users cannot browse/search stories by tags (or can you?) maybe optimising tags isn't really that useful.
4. Absolutely makes sense to have a process to review updated work. Would the Wild West without it. However, I think the process can be improved to offer a better product experience for readers and writers: that is for a published story to remain published while a single candidate version (with all the changes the author would like to make) is submitted for review. The candidate will then supersede the published version upon approval.
Thanks again for a great response.
Declan