"Omit Needless Clicks/Taps" That is a mantra I would suggest you keep in mind for any UX design. Clicks are now changing to taps as we move more toward screen tapping, but the idea is still the same.
Specifically, I'm liking the new Full View from what I've seen so far, but when I tap on Reply (I'm on a laptop with a mousepad) it opens up the right frame with a Reply box, but the cursor is not already in the Reply box. It should be. As it is now, the user has to click or tap again just to get the cursor in the reply box so he can start typing. That is a needless click/tap.
