It all goes with the theme. So these changes are nice improvements that are long overdue. So my initial concerns, in this area, were quickly assuaged.
Color also conveys information.
So the color choice is logical. This positioning meant that you are seldom going to miss when trying to close, and accidentally maximize the window instead. Microsoft on the other hand did a poor job with Windows. They are way too close as any Windows user can tell you. They also put those controls right next to the close control.