It looks like we'll be travelling to one of the cult locations soon, and it really would be shame to lose touch with Jackson while he recovers.
The dream bridge we used to make a path to Phileas's world also looks like it won't be used anytime soon, and be forgotten resource soon enough. We can instead put it to use, and be able to interact with Jackson in the same capacity we do with Emily between the missions.
We wouldn't need to contact his publisher either not when we can have the man directly with us, advising our course of action with the cult. We'd be able to take advantage of his Truth seeker abilities too, for when we get a difficult investigative plot than Oliver can't unravel on his own.
I really hope you guys reconsider this, Jackson's such a great character for the story.
Edit: I really like the Thoth idea btw. It's thematic, for a writer to draw on the god of Writing itself. I can already see a lot of potential overlap with other Thoth mythos.
-[] Muse about a possible resonance he might have with the Egyptian god Thoth as well, like you built one with Isis. Jackson is already familiar with Egyptian lore, could that be a direction he might be able to go?
Adding..
Thoth is associated with words, for a messenger must clearly state the cause of the one who sends him.
God of the moon, sacred texts, mathematics and sciences, magic and knowledge, and patron of scribes.
He bears the Stylus and Papyrus, as the god of Hieroglyphs. Mankind's use of speech, or writing, meant the introduction of ambiguity and falsehood at the worst. The potential for misunderstanding and deceit. Thus he is followed by a Dog-headed ape, the Cynocephalus. Who is tasked to distort the Word of the god - to mock, to simulate and to deceive. Illusion.