For Homebrew Website Club Wednesday, even though I didn’t make it to an in-person meetup I did manage to make some reasonable visible progress on my website.
I hacked together some tweaks to add the following:

Improved support in my theme for time related microformats including dt-published and dt-updated
Because I post so frequently, I added a visible timestamp next to the date so it’s easier to follow my timeline of posts.
I removed the data for my location, weather, and syndication links from the_body of my posts and appended it to my post meta data. This should prevent it from showing up in Webmentions to others’ websites or in syndicated copies, but still be available to parsers to attach that data to my posts in readers and other services.
I modified my CSS so that the text in the Simple Location and Syndication Links plugins matches that of the rest in its section.
I added a cute little bullhorn icon in front of my Syndication Links so that it has some parallelism with the rest of the meta data on my site.
I’d always liked the idea of adding in related posts data on my site, but didn’t like how it had worked in the past. Things were even worse with replying to other people’s posts as my markup (and far too many others I’ve seen in the WordPress world) was hacky and caused the related posts data to show up in their Webmentions sent to other sites. I looked through some of Jetpack’s documentation and figured out how to remove their Related Posts functionality from the_body, where it defaults, and append it instead to the post meta section of my posts. It’s not perfect yet, but it’s much closer to how I’d like it. Best of all, that data shouldn’t show up in my replies to other sites now either! I had disabled the functionality ages ago because it made me feel like a rude-IndieWebber.

With IndieWebCamp Online 2020 coming up this weekend, I hope to fix a few outstanding issues and roll these changes up into my open sourced IndieWeb Twenty Fifteen WordPress theme as my hackday project. If you’re using it on your own site, do let me know. Not that I can promise to fix it if it’s broken in places, but I’d at least like to know how it’s working out for you or where it could be improved.
Things left over to fix:

Simple Location data still needs some CSS help to display the way I want it to.
I need to target the Simple Location icon so I can have its color match that of the other icons.
Because so many of my posts don’t have titles, I’ll need to tweak something there so that the Jetpack related posts will pick up better meta data as a pseudo-title instead of displaying the relatively context-less commentary that appears in the_body.
It may take a day or two for the related posts to populate properly, but I should make sure that it’s putting out relevant/interesting results.
Is it worth adding a default featured photo for the related posts that don’t have one? Could I pull one from other meta fields for some classes of posts?