Ok, so your question about a new rss feed for Steter fics on AO3 got me thinking, and I ended up spending a couple hours customizing a new WordPress blog. Bottom line, I figured out how to link the Steter feed to the blog, so... yeah, apparently there is a new RSS feed somewhere after all. I'll still be running the one on Tumblr, but if anybody is interested, they can choose to follow along on WordPress here: https://steterfeed.home.blog/