Regarding the traditional login scene and log off options: I mentioned this in another forum thread (
here). The traditional login screen and functionality still exists, and many people have been bypassing the EVE Launcher and accessing it to restore the old functionality.
The new login functionality that we deployed today is designed to start changing the way users log into the EVE Universe; whilst it is often true that one shouldn't change something if it isn't broken, such a clich+¬ doesn't allow for changing priorities. Our goal was that by rolling out the new login method, and supporting the single sign on service, we could lay the groundwork to start moving people away from the messy multiboxing setups that have traditionally never been supported by us as a company, and towards something that makes more sense for CCP and the services we provide.
To expand on this point, there are a number of exotic setups for multiboxing involving either multiple physical installs of the game, hybrid symlinks, junctions, soft links, hard links, partial copies and more. And in almost every single case people multi box for one reason: to be able to have individual setups for their settings, or to hasten the login flow. The deployment today, as difficult and bad as it was (for which I apologise) was to deploy the single sign on service, through which we can start to work on these issues. My hope is that in the end, you will be able to log into the EVE Launcher once, which downloads your settings from the cloud, with all of your accounts linked, via either a single EVE master account or via some other OAuth provider, and be able to select characters and switch between them at the click of a single button.
As for the log off button, many people don't really use it to log off from the game, but rather as a quick means to quit the game and restart at the login screen. The new token based authentication that the EVE Launcher uses isn't cleared by the EVE client, and so when it attempts to restart, it will actually attempt to reconnect with expired credentials which would throw an error message. It isn't perfect though, and we will be working on a fix for this tomorrow and in the coming days.