I was able to read the book yesterday, and I'm not sure what kind of direction DC is going with the character. Punchline has lacked any definable opposition in the book, minus the crossover with Catwoman. I still get the impression that the title is used as extra page space for that book rather than being able to stand on it's own two feet.
I did like the throwback to Harper's definable time in Batman Eternal when she fought Mad Hatter, and I can't wait to get ahold of that variant cover with her on it.
I hope whatever comes next for Alexis and Harper is bit more even for both characters, instead of tilting to Punchline's favour every time. Harper's perspective and involvement in the Punchline One-Shot was what I found make it compelling.