Join Date:Joined: Sep 2013
it's not 4.4.2 it's Google Search
Fortunately, I had a fresh backup right before Google Search changed the home screens AND fails to acknowledge "OK, Google" with a beep. The spoken search function still works, but there's no way to know it has engaged unless you're watching the screen.
I suggest you wait a bit with this update.....
Nexus 7 2013, stock, rooted, 4.42 (running well!), TWRP, Xposed, etc.....