Most of the things in window can (or could
) be controlled using keyboard, in fact the only thing I haven't managed to do without mouse is to show/hide window frame in MSN Messenger >6.
But I wouldn't like to argue what can be done with keyboard and what can not, chatting is about text and every need for mouse is inefficient... btw. the guys with wireless mice have to look desperately for theirs mice all the time
All of MS software is able to work with only kbd and most of professional 3rd party applications as well. Plus is an extension to MS app so it should match the philosophy of MS apps.
And as you can see all these
/commands are here just to avoid mouse!
I think it is quite easy to correct the GUI to accept keyboard input, as we are used to in Plus ver. 2...