Don't know what you mean by "windows management interface". I've used Windows's own popup (from a tray icon) to select wireless when I had no Realtek software on the machine. I se no need for a slider.
Oh, I call that a "start menu". And on a multiscreen setup, I find metro easier, as it only fills one of the two or more monitors, so I'm not sure why you think it's worse with more monitors.
See other post, it's got LOADS of options now. Those were not there with the original or I would have played with them immediately.