There was an extra entry for the Amazon shopping app added that I disabled with Package Disabler Pro. Other than that, I have not noticed anything. Was hoping they would make the radio a little better, my signal has been pretty terrible with this device.
I turned off the enhanced HD phone call stuff, and that seemed to make it a bit better, but speed and coverage don't seem as good as they were with the Nexus 6. If I notice something else change I will report back, but nothing major seen yet.
Got another update today, looks like a very slight revision change. LMY47X.N920AUCU2A016 now. Nothing major noticed yet, guessing minor bug squashing. Hopefully prepping for Android 6.0.