I'm glad to see they start in HK and end in Shanghai. I want to say when I wrote my China trip report, I was hoping that
ABD would consider restructuring it this way to give guests the opportunity to add pre or post days for HKDL and SDL. I think Shanghai warranted more time on my itinerary. It was my favorite city, and we just had 2 days there. Now at least you have the option of adding post days. I do see they took out M on the Bund in Shanghai which is a shame. I would highly recommend a reservation there on your own if you add post nights. M on the Bund is on an upper floor with a large balcony overlooking the Bund and skyline. Seeing the Shanghai skyline lit up at night is an absolute must do. It would be criminal to miss it. That AND HK are the best skylines in the world to see lit up. That's the biggest omission, but you can easily do that on your own.
They've added the Temple of Heaven in Beijing which we did on our own. That's a pilgrimage site for an Epcot fan. They've improved (fingers crossed) one of the dinners in Beijing... learn to like duck if you don't already. Peking Duck: duck in a pancake with sauce - how can that be wrong? Some of the hotels have been upgraded. They were already quite good. Most of the activities are unchanged. I'd just suggest adding more time in HK and Shanghai.