She should only do a Christmas album if she's going to take another super long break. But she really has no reason to, so I hope that's not the case. As long as she's not taking another long break, she doesn't need to bridge the gap between anything, so I can wait (but I hope she does a Christmas album at some point in her career).
As for the Wembley setlist, I agree. She needs to change up the setlist a bit. I love everything in the setlist at the moment, but she should add "I'll Be Waiting, "River Lea," and "Why Do You Love Me" so there's more upbeat songs. Also, she should do a cover for those shows. On the last tour, she did "I Can't Make You Love Me" during the iTunes Festival and the Royal Albert Hall. If any of these shows are being filmed for the DVD, she should do another cover ("Landslide" or "The Way We Were," PLEASE)!