I'm trying to use IE11, but the #1 issue I find are document modes.

I often find sites which set the wrong document mode (ex. IE9), and the site behaves broken in comparison with the IE11 document mode. (Basically people taking for granted that every IE is a faulty browser, and giving up completely).

Plus, having zero ability to tell IE: "Fuck the Internet, I want to use the newest document mode for everything!!!" is a really negative misfeature.

If anyone from the IE team reads this: Please, add a system policy to force a document mode unless compatibility mode is enabled.