i factory reset mine just before updating because 1) it was laggy and full of crap 2) i heard nasty stories of things getting worse if i didn't and 3) mine wouldn't even see the OTA until i factory reset and cleared data from Play Services
It's marginally better than KitKat (which, after the features were ever-so-kindly stripped out by Google, was just Jelly Bean with white status bar icons) since it has ART now, but all the good stuff for the most part remains stripped out. no transparent bars, no launcher, and so on. it's still neutered Lollipop.
Google's support for the N10 has so far been nothing short of abysmal for reasons unknown, to the point that i might trade it in for a Nexus 9 next Spring hoping it isn't neutered anymore.
The KitKat release was such a disappointment i actually got so angry that i tried smashing the thing. i tried everything, from slamming it sideways attempting to break the screen, to stomping it with my foot. didn't put a scratch on it!
It's built so solid, and is a decent piece of hardware, so why on earth does Google hate it so much? they treat it as if it were the Nexus Q (another underrated tech)