The Children each have the Gift their Mother Allison has maybe they need to introduce a crossing where Joe finds out he's partially responsible for the children's different abilities because of his latent unknown Psychic ability.
Which leads him to strong mixed up grips of doubt and losing his mind and did I say Doubt?
He's always portrayed as the rational thinker whom has to come to grips with his five senses leading the way but suddenly this talent shows itself , manifesting and showing it wasn't't only Alison and her gift.
Maybe a uncontrollable Telekinesis that gets him in difficult situations.
Maybe he slips out of his body and goes on a Walk-About with a silver tethered misty silver thread that connects him through a rip to his physical self.
It's definitely time for his character to take a stumble and have to grip at what Alison has been trying to share a never could.
Even if they strip him of the Gift later and return him to his old self.
Just really tired of seeing him mimic the same logical thoughts after seeing what he's seen, add a little fun realism twist to the character.
Just a thought and an Opinion.