I enjoyed the latest iFixit teardown for the new iPad Pro. Apple made several improvements, including the ability to remove the batteries without taking the entire thing apart.
Also, you’ll see that the CPU runs down the center of the device, which makes it a lot more stable and allows it to cool more easily. In years past, the CPU was on the side. There’s also a cover over the CPU, giving additional rigidity across the long axis but not the shorter one, explaining why the iPad is doing better in bend tests along the long axis. Overall, it looks like a solid design.