Mike White isn't a better QB. He is just an extremely unprepared, different bad QB.
I am not against the move but it would look bad internally and externally to basically sign a really, really, REALLY bad street FA QB to start over your entire depth chart at QB in the middle of a "playoff hunt."
I understand the logic of why you would want to see a different terrible QB but I also understand how difficult that would be to do at this point in the season.
After mathematical elimination, it should be "fug it" territory. Start Dowdle at QB for all I care.