It's holding up decently, but in a way that lets him actually release feelings, which wasn't how it was before. It's because of those cracks that he was able to open up to Mouse about dying and to Aoko about being uncertain over the Jabberwock :|a So he's not... completely open (I don't think he can be because poker facing is such an essential part of his coping process, he wouldn't be able to function at all without it), but he's healthy enough that the cracks allow things through that the mask wouldn't allow through before.

Do you have any dream amnesia names for Shinichi :D