People say they still love RSS because they control their reader and feeds collection. It's much easier to control when you have all sources in one place. Comparing to allowed notifications/email subscriptions when you don't recall where you are until you get a spam.
Awakari offers a single place to control all your sources and subscriptions.
Additionally it offers a way to filter the content
That doesn't make sense. You have no control over what's in the feed, the feed owner does