Dear Makslane:
This is an idea, not a request!
I thought that maybe the regions that you can have in GE (the canvas, Wire-Framed Region, Filled Region & maybe the Activation region) could not only be those rectangles, but maybe you could have an option to make them circle-ellipse shaped, or triangular.
There are times in the GE developement, when you imagine you could have an invisible diagonal line where you cannot go further, I thought that this could make the games a little more "spicy".
If it is possible , you could make n-gons too. I don't think these are possible, and when it comes to being precise, and buttons, then these might come useful...