The new Systems are a huge improvement over the old version. I had the opportunity to ride the new Process boots (as well as the other boots) and was extremely impressed with them. The boots are lightweight, comfortable and have a much more precise lasted fit. The Process boots are higher on your ankle than most of the others, but still have quite a bit of flex to them where you want it.
The bindings are now baseless as stated above, but they also have a urethane back piece that allows the binding to flex laterally but not flex when you put pressure back on it. This makes the bindings fit more securely and give more support on a hard edge than 2013 or earlier models, but flex more when moved side to side.
I'm a big fan of flexible boots and my favorite systems were the Webb and the Byerly, but when ridden with the laces / velcro loose, the Process was still plenty flexible. If you prefer a stiffer boot I would look into the Marek, but the Process is still a great pick.