I'd say that past a given point, you'll have exhausted the raw content of the Bible and have to come up with interpretations (which may prove heretical) by yourself. That is improve your Theology through practice. That would be my main argument for limiting the Bible's level rather than make it an ArM4 Authority. Those levels you have acquired past the book's would purely represent knowledge of how other people have interpreted the Bible in the past, which have been ruled canonical by the Church, etc.
I have no problem with house-ruling things like incomplete books on a case-by-case basis. Merely reducing quality is a bit dull, although I can quite see how it is desirable from a player's point of view (including mine ). Of course, I've already made my opinion known in the last thread on Authorities.
). Of course, I've already made my opinion known in the last thread on Authorities.