I get your point that people expect differently from Google, but Google brought that upon themselves by marketing Android as an open source alternative to iOS. Now they've got the market share and developers, they're no longer interested in marketing it this way and are now apparently more interested in cementing the walled garden.

The battery issue is a valid concern, but I don't buy that this policy is purely to fix that problem. They took the opportunity to make sure people are passing all of their data through Google services in order to have full functionality on their devices.