Yes, you have a good point about consistency. That's one of several reasons the siloed equivalents of RSS (Twitter, Facebook, etc) "won". There's a consistent appearance, consistent metadata, and consistent interactions when it comes to liking and commenting; that kind of interaction was never standardised with RSS, despite some basic attempts. The best you could do was "star it on Google Reader" as a de facto standard.

This is really orthogonal to the question of stream filtering, I maintain that's still an issue for RSS aggregators even though as you point out, there are other usability concerns too.