hey,
idk what has changed for the "new format" but I took CS in august and used only FA CS (the new version). I went through the book 2x with a partner practicing each scenario with a time limit. The real exam had like 5 or 6 scenarios verbatim from that book, 3-4 scenarios that were just a tad bit different and about 2-3 that I hadn't seen before but knew what to do just from reading the FA CS. It's very important to practice your scenarios timed.
I'm not sure how much help my experience is for you but I thought I'd let you know anyways. That way if there is not a new CS book out, you can use FA CS as your base, and add what has changed to that.
Bottom line- FA CS 2x was more than enough for the "old CS".