Have you tried https://bazqux.com ? It was built right after Google shut down Reader and very much resembles and improved upon it in multiple ways. Super fast too.
Hey i'm working on a News Aggregation platform / RSS reader, aktu.io.
It doesn't have the features you need but if you'd like to give it a try anyway, would love your feedback.
You can check out the main features here: - https://aktu.io/about - and here https://medium.com/@julien.aktu/rss-less-noise-more-informat...
I’d probably pay large amount of money now for a news reader w/ these 4 features * Extract stories from my feed/lists on Twitter & Reddit and aggregate comments on these from people I follow * Learn from my ‘more/less like this’ on individual stories * Allow me to tag sources and create auto-tagging filters * Clean/intuitive Web UI & mobile client