Certain aspects of the game for sure changed during the development, but the main idea has never changed. The game has never been about Monica getting her life back, winning, punishing her enemies and so on. Never. All that crap was a figment of the imagination of that Cuck5851 above. The main idea was clearly stated at the beginning of the game and has been followed constantly - Monica is supposed to fall down. No more, no less.
And about which branches last longer or shorter, etc. It is not necessary the case. The truth is often more simple - the developer lacks the ideas how to progress some branch and decides to finish it. That is it. Also, and I would say in most cases for adult games, the last branch that is finished is the one which supporters like best. Following this logic, the most important branch is Fred's one. Guys from Patreon love it.