Moving it to bottom right because of the keyboard might not be that strong of an argument, since there already is a keyboard shortcut (ctrl+backspace) to access the task switcher from the keyboard. Since you're using two hands anyway in that mode, you wouldn't win much here. But of course the main issue is that would you then move the entire top row down: status area, app. back/close button etc. I perhaps wouldn't think that to be a very good idea.