Khan wasn't too conscious about the changes that finding the array of asteroids had caused. Yet, some soldiers noticed them, especially those who had happened to interact with him in the past.
Returning to Coravis virtually emptied Khan's schedule. He had nothing to do but wait for Garret and his scientists to complete the projects connected with the asteroids' exploration, in which he wasn't involved at all.
That free time could allow Khan to return to Baoway and check in with other aspects of his organization. After all, Coravis had a teleport, so getting there would take less than a few minutes.
Still, the situation within the Nognes family was relatively complicated, and Khan was prone to messes. He didn't want to get involved in politics again, and it didn't feel right to reappear in public without Monica.