Davy does a lot of talking, but he's killed one minor character in 8 chapters. For being someone who was trained for a thousand years by legends, he took way too long to strengthen his body and way too long to start moving against his enemies.
I found it weird that the father wouldn't want to see his own son after he got out of a coma. And now they made it pretty obvious...Hmm sounds like there's more to this than just a Cercei plot (minus the incest)