Regarding [NOT PROVIDED], google can certainly claim not supplying a Referer as a best practice.
They do, of course, have the data, and are choosing not to integrate it into GA for free. However, they do share the same type of data with Adwords advertisers, even when it's a logged in/https request. And, if you integrate GA with Adwords, you see it.
Since that's the case, I don't really buy privacy as their motivation.