Some filters include, "Subreddits that are large and dedicated to specific games are heavily filtered, as well as specific sports, and narrowly focused politically related subreddits, etc."
Yet, this past week, all I see on the front page are political posts & subreddits that are left leaning. Not to start a political argument, but, reddit makes it clear that they are filtering out posts that include conservative views. All I see are posts making fun of POTUS through memes, or how he caused a problem.
Politics aside, I just don't see how reddit will last if their political agenda outweighs their ability to provide a site which allows for sharing of information and discussion. I don't want the front page to consist of highly opinionated political posts, since their reasoning behind /r/popular was to "filter out" focused political groups.
If you want evidence, look at the internet archive time machine for reddit starting this past week, around the 17th of February.