The sign in process is a pain, why you have gone to the bother of changing the look when it is the function that needed changing.
It is very tiresome to have to login several times a day and then to be greeted by an experience that requires 3 steps to get in. why do I need to tell you if this speeds up sign in when you know it just slows down a slow sign in. Then while in the middle of work, I am notified my login has expired and I need to again login. I think you need to offer selectable sign in options. The security needs of a group are quite different than the security needs of a single business operator working at home.