Ideally, it would be great if the option to filter your feed mapped well on to comment curation. But, I don't think that is the case. Ignore actually exists primarily because people can follow tags. If you only follow people, it's fairly easy to limit your exposure to a user by who you follow. However, if you follow a tag, ignore is the only way to avoid a specific user that posts with that tag. Mute is designed primarily so that users can protect their own posts against abusive comments. Biasing the comment sort is fairly distinct from these functions. There may be some overlap with these functions and Hush, however, although ignore and mute currently bias the comment sort, I have never used them for that effect, since their primary effect is much more consequential. At any rate, it will be an experiment. We can run it for a while, and see how people feel about it, and how it might be changed or improved.