Ah the whole writting changing is just a myth, I can read no problem in dreams too. Only way for it to change, is if I am focusing on it to change and re-read like 9 or so times, otherwise it will remain the same.

Personally, I have read a lot of dream books and they always give pretty coherent and interesting stories to read, though never writte them out in the morning, since that would take too much time and I am way too lazy <.<