That the universe began in perfection and has been deteriorating since is a very common part of the creationist viewpoint, so I don't think they're switching frameworks when they remind us of this. Maybe we understandably fail to take it into account if they don't mention it explicitly up front, but we do know about it.
Dr Adequate is seeking a way to counter the creationist claim of no new information without requiring an understanding of information theory or even a definition of information. I don't know that this is possible, though it seems well worth exploring. But it is possible that creationists only buy into the bogus creationist claims about information solely because they don't understand information theory or even know what information is, and that therefore you have to educate them before you can convince them.
It again feels like 2LOT discussions to me. I don't think I've ever been involved in a 2LOT discussion where the creationist eventually came to understand that it isn't about messy rooms, and I think information theory presents many of the same conceptual problems.
--Percy