I'm a bit confused by that section as well. Is Martins feedback given this categorization technical feedback?

> Unless critique is focused on improving the software in question it is pretty much a waste of the time of the people who are trying to improve the software in question.

The criticism was not focused on improving the software in question (Mir). That could mean he regards it as waste of time - or if we do the additional step and realize we are talking about the _software_ solution of the display-server as a whole, it might be not meant by that.

I don't know.

The only technical criticism that he wants is how to make Ubuntu better. The technical criticism that he received is that he can't try to make Ubuntu better by making KWin worse. KWin is not responsible for distros. If a distro has a distro specific patch, the distro has to maintain that patch themselves.