>my main complain is not having username and password fields on the same page :/

This!

Our new Linux login has username and password entry fields in separate (and successive) windows, and they look quite similar.

Since I enter my password much more often (to unlock) than my username, I built up a reflex of entering the password, and the rare times I have to enter my username I often type in the password instead, visible to anyone looking at the screen.

I see this new design as a security issue.