For #4 I meant that you could add other keys besides F1-F19 to quit Plexer, for example. I don't really think that the press '1' and change that keystroke to 'CTRL+1' is allowed - yes, I know other programs do it, but to me that is not "one key press equally one key press".

The icon in the menu bar changes from black to blue; I think it's too subtle though.