Sorry. See, now, THAT was a bad pun. "Split happens" (in context in WW 4) is a good one. It puts a clever, purposeful spin on a something familiar.
Dr. Johnson also said “If I were punished for every pun I shed, there would not be left a puny shed of my punnish head.” So, you know, if Johnson himself, as well as shakespeare, could stoop so "low," why shouldn't Azzarello?
He also said, in "Preface to Shakespeare," that "A quibble is the golden apple for which he will always turn aside from his career, or stoop from his elevation." So, see?--if puns are golden apples, it's appropriate for at least Strife to use them. :)
What you say about "so big an impression of the writer's thought process at work," that's an interesting point--but what if we're getting an impression of the character's min at work, not just the author's? Azz doesn't just spread the puns evenly among the characters--you don't see Wonder Woman herself punning that often, for instance; the way characters play with words shows you something about how they think, and it shows you very concisely.