Even as a Lobdell hater myself, I will defend the decision to keep him on the book for the simple reason that he seems to have built a consistent fanbase on it. I personally think it's mediocre and not as good as it should be, but the guy knows how to write Jason's personality on a monthly basis, and you can see from the book's fans above that they find it engaging.
I won't buy it myself, but I'l applaud its continued success in keeping Jason with a decent-ish monthly book.