I came across another alternative reader I hadn't tried before: BazQux Reader
It's not a free option, but they do have a 30 day free trial. If you like it you can purchase a subscription.
It is FAST, and has features like
- being able to subscribe to public Twitter, Instagram and Facebook feeds!
- fetch the full text for a feed
- and ties in with other services like Evernote
Paired with Feedme for Android, and it's what I've been missing for a long time!