The rewrite is basically just to make Dean's personality and who he is shine through more on his route as most of the things that makes him interesting or rather, about him, exist more on other routes. So that needs to change.
Consider B... not nearly as dire as the others. Expect a lot more survival, or at least that's the intention. Granted so far it's maybe been one or two surviving so that's not much of a stretch. As far as living or dying based on choices, the original plan was to have the final run be something closer to Mass Effect, choosing the characters for different jobs based on what they are good at and if you choose right they live, wrong they die. This was cut though due to a few factors, scope not being part of them. Mostly with people not really wanting to engage with mechanics in their visual novel, along with me botching character details in their delivery for people to properly understand.
Maybe in another project we can have something like this, but for now just expect a clear(ish) run to the end.