The Doc did seem weird this chapter, but even Shiho acted weird (mostly for fan service) when trying to help Shioon. My best guess is that he'll just want to research Shioon's body to learn more about what or how he can benefit from it. At the most, he'll probably want a blood sample from him for starters. Being that his body can repair itself easily, maybe it can also repair it's own ki center through some unknown method?

Chango and his fellow cronies are going to delay Shioon's ki center restoration. Hopefully the process itself isn't instantaneous. I want Shioon to take his time to restore his ki center. I'm saying this so we can take a look at what's going on in the Murim world, and mostly what Chunwoo is doing presently. I can't imagine he knows that his ex-disciple is being targeted for death.