I have enjoyed all of King's work up to this point, so I do think everyone dumps on the King style a little too much.
Having said that, Batman/Catwoman is the first King book where the King style is grating on me (despite loving Strange Adventures at the same time). Things that didn't annoy me on his other work (circuitious dialogue, talking past one another) is really not working for me here.
Having multiple timelines just adds confusion without adding to the experience for me. It is becoming just a narrative flourish without actually making the story better. After three issues, I feel like this series is a plot that could be completed in 1-2 issues, but is instead being stretched out with different time periods added for mystery.
It is perplexing, as the way King plays with using different timelines for mystery and revelation works perfectly in Strange Adventures and in Rorscharch. I don't know why it just isn't working here.