I am slowly digging through the latest BlackBerry 10.2.1.1055 OS and the new feature I am digging is the overlaid next and previous buttons. I turned it on and I have to say I like it. When you open an email the hub overlays a Back and Next arrow button in the lower left above the action bar. It still plays the annoying animation but it works much faster than the gesture.
I also noticed that BlackBerry changed the button for loading images in an email. They also added the ability for you to compose an email in plain text like you used to be able to on legacy BlackBerry devices. What is with all the legacy features coming back in OS 10.2.1? I am liking it!