For 1, my honest theory is that he doesn't know where we are. We know he knows that the energies would transport us, but there's no indication he knows where.
If not that, then it's possibly the Tyrants. His modus operandi is to subtly help people improve, which seems to be at odds with the Tyrants' more direct approaches. With how they're tied to the miasma, I could see them having enough power to keep him from communicating with us.