Why did they update 20 days before announcing a new update?

My Gnex updated to 4.1.2 20 days before 4.2.0 . Why did they do that?

It wouldn't take so much effort to put that in the 4.2.0 update doesn't it?

I don't have a clue why they would do that? Do you have a clue?

It wasn't the most needed update ever, especially for the Gnex people. Nex7 got a needed UI change and some minor tweaks, but on the Gnex it wasn't very important to not put it into 4.2 JB