My biggest problem so far is that the RSS data is often very lacking (body, images, etc) and that there are still lots of content I'd like to filter out by sentiment. Like if I follow a technology outlet I don't want to know that there's an absolute steal on Sonos Arc on Bestbuy because I'm generally not into consuming and I live in northern Europe.
I have high hopes for ML to populate the RSS data and filter content like this. I want to experiment with this.