The fling performance in the book list is much improved, and I like the new settings menu.
When I went into the Grouping Drawer settings, I looked at Make groups for custom columns but didn't change anything. I hit OK instead of cancel and even though I didn't change anything it still updated the database. I exited CC and went to the settings again and it didn't update when I hit OK the second time. I backed CC up right after updating to 4.4.4g so I restored it to see if maybe I did tap something without realizing it, but it did update the db even without me making changes.
Has there always been empty space at the top and bottom of the settings menu? I only noticed because I was having trouble scrolling up and down in the menu. If I first touch the empty area and continue swiping the menu doesn't move. My Nexus 5 doesn't have the same blank area. Here's a screenshot from my Nexus 7 with cutoff text at the top and bottom so you can see the empty spaces:
