I sign out with two clicks -- sure I'm "signed out" -- but not really. The web browser shows that I was logged in -- yes I need to enter a password -- but I am not fully signed out yet. So the next person knows I was signed in, and sees my name, and my account. For someone using a semi-public computer that is not very secure. And now he/she has to do the extra steps that I didn't bother to do yet, in order for them to be able to login. In short, it always takes 6 mouse clicks to log out so that the next person or next account can log in.
That is, just, not helpful. We used to be able to sign out, fully, 100%, totally, with a single keyclick. Now it takes 6 keyclicks to do the same thing.
I don't appreciate all the silly glowy rainbowy trash on my login screen either. That's not a simpler cleaner screen. It is designed to be flashy.