The episode was good. I like that it's gotten a more Hellblazery feel than the New 52 comic does. And I like the fact that he does the scheming backstabbing bit.
And I do think that Constantine as a character has some compassion. Sure, he hides from it, sure, he suppresses the guilt, But what about the storyline where he was homeless and, was it a daemon or vampire who kills the guy he was squatting with. And then asks him if he was his friend, to which a despondent looking Con. says 'He must be. He's dead.' or words to the affect of.
I always thought his character was more playing the hard man about it, but most of the time he stabbed people in the back he felt it a little.
Even in the original Gary Leicester storyline, he drinks himself to oblivion rather than listen to the screaming.
Side not, it would have been cool to see Papa Midnite being the Shaman in this episode. In the comics, they had a fairly psycho relationship, and it would have added to the characters to have them fighting it out last week, only to be working together in a 'what ever you do, don't mention the war' kinda way this week.
But all in all, it wasn't a disappointing retelling of the classic story.