Ok, here is something to consider that I noticed about the professors writing style and why this may be an issue in what we are seeing.
The professor seems to "self insert" in some of his writing of the characters (he suggests this in his comments about how much he loves Lacey's character).
Self inserting has benefits, but many pit falls and it is one a lot of amateur writers have issues with. Basically it is when a writer finds some connection or relation to the character they are writing. It doesn't have to be a literal "self insert", it can simply be an empathy, or some means to where the writer finds some connection to the character.
Normally, this isn't a big issue, but it does become a problem if the writer hasn't solidified their story progression on the characters and their states. The problems evolve with how the writer begins to favor that specific character and then that character is allowed to circumvent the story structure through various inconsistent or "miraculous" means.
The professor loves Lacey, he has stated it as such, and I would wager he has connections with various characters that have all of a sudden shown drastic change in their progression in the story. Combine the fact that the professor writes in a manner that is more "in the moment" and you can see how this can have an effect on story and character structure to which it flows where the professor is focusing, and not entirely with respect to the story he has presented.
So what does this mean? It means that the story can go anywhere. Currently Lacey is the favorite, but do not discount that other characters, at specific times, could also find favor and have adjustments that conflict with their current direction in the writing.
I honestly don't know if this is the issue, it seems like it, the story seems flow like this when you pay attention to specific character changes, but for whatever the reason is, they do and this "may" be some ultimate progression the professor has planned, so I have no clue to be honest, but I do notice "favoring" at times in the writing that "forces" extreme changes in character progression and this makes it "extremely" difficult to figure out what is going on and what "may" be happening next.
All I know is that this is an issue in a lot of modern writing and it does cause serious issues with story flow, consistency, and respect to resolution in many works out there.