I don't know the update package is small, less than 2mb, but there are lots of apps that gets patched just like the previous one. The dialer framework gets patched too.
Not enough to warant me to switch back to stock to try it out. But if you want to sideload it, here it is. This is to update from version 4.4.1 to 4.4.2:
http://android.clients.google.com/p....signed-occam-KOT49H-from-KOT49E.0ec632f5.zip
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My update arrived in the early hours in the UK.
What are the other changes after 4.4.2 update on Nexus 4?