On the whole, the update is quite good. One MAJOR qualm (other than a worsened facebook integration) is the music app.
You know, I could get over the fact that it sometimes takes twenty years to load. I could get over the fact that (and I expected this to happen) they completely f*cked-up my beautifully archived, artist background, 100% accurate album covers, etc. and MPAtool wouldn't be able to fix it immediately. Hell, I could even get over the fact that there's no longer a live tile.
But when "Metroid" (Original Soundtrack) is changed to "John Carpenter" along with a horrendous background and wrong album covers, as well as ABSOLUTELY NO WAY to turn off Xbox Music integration, that's where my irritation comes to a boil. Honestly, THIS WAS SUPPOSED TO BE A BASIC MEDIA PLAYER. How Microsoft managed to screw up such a simple (yet central aspect in my WP experience) is nothing short of astounding. I sincerely hope they get their act together and make use of the 'separate apps for more timely updates' like, now, because I can't find certain music due to completely wrong, automatic labeling.
Is Microsoft even aware of this?? Do they care?? Almost everyone pointed out that Xbox music was a waste of app space in its implementation yet they pushed it through.