Received the 5.02 OTA today on my XT1063 (US). installed fine. I was rooted, but unrooted using SuperSU (strangely, "full unroot" hung, but "unroot for installing a different SU app" worked just fine). I was using stock recovery, and the OTA installed perfectly fine.
Bonus: forgot to revert to original hosts from adaway before installing the OTA. Still worked! So now, I don't have root, but am ad-free!!
So looks like (for now) "Lolipop OTAs require an untouched /system" is a bit of an exaggeration. Hooray!
(haven't re-rooted yet).
Today's Lollipop 5.0.2 rollout for Moto G (1st Gen & 2nd Gen): this is a soak test for India, Brazil & the U.S. If the performance data looks good after several days, then we'll roll out more widely. This is why some may see 'up to date' when checking - it is not yet exposed to the whole user population.
Note: Moto G (1st Gen) users need to ensure that they have the latest Motorola Updates Services from the Play Store. If you see an update available, please install it - otherwise you will not see the future Lollipop upgrade notification. This is not necessary for Moto G (2nd Gen).
Have Google given any indication when they'll be moving to the new patching system?
Hopefully Moto keeps using the old patching system as they haven't been particularly forthcoming with providing factory images for the Moto G 2014.
There are no redraws or issues like this, but the ram management is still agressive, but you have more free ram now with lollipop. If you go under 300MB of free RAM the rom is still starting to kill apps agressively. It's definitely better than on kitkat, but could be even much better ..