[yummy]

Well, it's just the Google play services and some other API they are attempting to replace. Not even mentioning poor documentation.

But anyway, what's the point if I'm going to use ~10 of proprietary GApps anyway (maps, keep, inbox...) ?

[bubblethink]

The point is that it's entirely up to you how many google apis you want to use, and at what terms. You aren't installing an opaque google play blob as a system app.