Hanging applications can no longer be minimized because in CSD world the application has to agree first. This is also basically the same topic killing applications.
That could be worked around by, and here's the reply to RealNC and ?his? fdo standardization idea, developing a deamon which handles the decorations which would result in something that basically is a server-side decoration, only on another level. And there is nothing any Wayland dev could do about it. So much you ?Wayland works that way and deal with it? shouters?