Does anyone even listen to creationists these days?

[Gilrandir]

Well, if you believe that the book is the literal truth and the word of God, then it was divinely inspired, both the writing and the selection of what to include in it, although I have never heard how modern christians exactly justify the selection.

If they justify it somehow (which I don't know either), they could extend this justification to at least some modern attempts at updating. Unfortunatley (or fortunately, who knows), religions are all about tradition, keeping, preserving and not swerving from. Any attempts to do the opposite are considered heresy and treated correspondingly.

Your last suggestion only works for Christians if someone actually did get a divine inspiration to do so because otherwise they would be a false prophet who is intentionally misleading people in service of the devil. Not exactly something you should suggest to a believer.
The bible also says that one should be wary of such false prophets and check the things people preach against the teachings of the bible, so getting such a change accepted in the more literal/fundamentalist christian circles would be quite hard.

Like I said, copyright enforcement: listen only to me, and if you listen to others you are a recreant. But it has one more dimension to it: all prophets are extinct and anyone in the future who will pretend to be one is not. As if times around 0 AD abounded in prophets and they have become increasingly scarce since then and eventually modern era is barren and arid.