Okay I'll bite: Look at where that G+ button is. It's big, its first, and it combines, as-one, an already existing feature -- the "Like" button. The G+ button

Okay I'll bite: Look at where that G+ button is. It's big, its first, and it combines, as-one, an already existing feature -- the "Like" button. The G+ button isn't optionial, placed in a "secondary" position (i.e. to the right), or a single feature/choice. That's probably why users are getting upset with this, UX background or not.