I don't use TO really often but I sometimes find it really handy. Thing is, as I use it ever so often as once or twice a month, the closed windows/crashed windows keep staking and when I come back to TO and see this I really think it lacks the multiple-select feature. Because I'd click on the last one, holding (for example) the Shift key, then I'd click on the first one, and just press Delete and all of this ridiculous windows stack would be gone.
Also, using delete as a shortcut to, well, delete a window would be cool.