User blog:KrspaceT/What would be considered 'bad' ratings?

What sorts of numbers would spell concern for Toonami? Recently, Toonami hasn't been retaining a lot of million view nights; is it because Bleach and One Piece (? might be wrong here) are on filler arcs that people dislike? Is it Naruto's Chunnin Exam fights repelling people? Or is this a bad time for late night watchers due to tests and mid terms this time of year?