Horseshit. There is no 'going to re-write'
Books like Twilight are few and far between
are you sure about this
my whole fucking point was that it's something that happens and i'm pretty sure it's not nearly as rare as you think
and in the specific case of Twilight it was a monumental change
the original ending Bella is transformed into a vampire to save her life in the scene at the end where there's a fight an Bella ends up in the hospital
if you binge-read the series, you can totally tell that the entire second book was thoroughly outlined by an fucking editor with Stephanie really just filling in some blanks, in the first book, Jacob Black isn't even a properly-developed-character, he's just a fucking prop to help the female narrator figure out that the main male is a fucking vampire
and the idea to stretch the trilogy into a quartet wasn't even made until after the third book was heavily outlined
this is why Jacob still doesn't have a girlfriend at the end of the third book, even though the third book describes imprinting
if they'd kept it as a trilogy, the explanation of imprinting would have been earlier in the third book, (or maybe even the end of the second book) and Jacob would have imprinted with someone before Bella got pregnant instead of imprinting on Bella's kid
but then the decision was made to make the 4th book the last in the series instead of doing a 5th book
with explains all the weird-as-shit moments in the 4th book
most of the acid-trippy things about the 4th book were really just the editors painting Stephanie into a corner by insisting the trilogy get stretched into a quartet and then the editors refusing to stretch out the story into a 5th book
if they'd kept Stephanie's original first-book ending of Bella turning into a vampire after the big fight at the end of the first book
Jacob could have easily been used as the male in a same-universe romance novel that wouldn't have had Bella being the narrator
where Jacob's past interaction with Bella wouldn't take up a huge amount of text and Jacob getting married/happily-ever-after would have been Jacob with someone older than Bella instead of Bella's fucking Daughter