chapter two:
Ha! Ha ha! Ha ha ha!
I like Drudge very much. The dialogue between them in this chapter is good as gold. At first I wondered if Drudge was just playing dead to confuse and dupe Krag, because he is an amoral thief, and wondering if he was dead or if it was a trick was fun. Chapter three cleared that up, though.
Yes, Krag has intelligent thoughts, and it goes against the barbarian stereotype to have intelligent thoughts, but given the comic tone I don't think you need to worry about staying true to the barbarian stereotype. It's not like you stay true to the stereotypical panteon, or the stereotypical circumstance of death. I imagine you'll violate some other stereotypes as the novel progresses. So I think it's fine to have a sensitive, thinking barbarian. You've set him up as sensitive and musical (or having musical tendencies) already. So all you need to do is include some note on how the barbarian society was intellectual (you could throw it in with the explanation of the calendar - it might fit there) or how Krag was just smart. And you could do it in a ridiculous way that fits in with everything else ridiculous. It's not a problem. It's an opportunity.
chapter three:
Tell me what you think of the ideas and the characters, specifically Drudge
He's my favorite so far. He's dead, and he's funny.
he's the most inconsistent character in the book
Okay...
but he appears here as I like him best--sneaky and shady and largely amoral
Yes.
Sneaky, shady, largely amoral = inconsistent. I see no conflict. Maybe there's a problem that arises in future chapters, but he's dead. Death can do strange things to people, right?
I assume you're going to weave his being dead into the story somehow, and resolve it or at least explain it. That's what I'd like to see from him. And that he continue being who he is.