"Nicely done, Guardian," Micah says. She's seen the effects of your efforts out in the Pale Heart, and she's impressed, optimistic for the future.
There's still more to be done. Micah mentions Ulan-Tan, a historical Warlock with theories about Light and Darkness which were considered dangerous at the time. All Light was part of itself, he had concluded: Ghosts connected to Guardians connected to the Traveler, inextricably tied together. Micah thinks—maybe—that the problem with this damaged Ghost is that they've been disconnected from the Traveler in some way and forced to rely only on their own Light.
She's found some places, deep in the Pale Heart, that she thinks are as close to the Traveler's unfiltered essence as you can possibly get. Maybe there you can join this Ghost's Light with the Traveler's again. And even if that doesn't help, you'll still know more than you did before.
"No harm, no foul," Micah says, though she'd clearly prefer the idea works. The slow process of eliminating what doesn't work isn't ideal for situations like these. "Sending you one of the locations I've dug up now."