of course I don't know

... but I don't think it's "just that," Zoey is still the same, what will change as usual is how she will be perceived, what consequences her actions will have
it is a very particular passage and one that in Zoey's story has a big importance, depending on what she does she will or will not still have friends in San Diego
from what little we've seen it would seem that one of the reasons MC gave up on her was because of Emma's post, which he more or less believed by convincing himself that Zoey was moving on with her new life in San Diego, so I think that point will be one of the clarifications that will take place between the two, from that to a direct or indirect involvement of Emma I see very little struggle there
p.s. DPC is very lazy, if he creates a character he reuses it, he has done it almost every time (including Rusty's new girlfriend just to give an example)