Replacing Yosemite RED/ORANGE/GREEN window buttons with standard Mac OS X icons? I've tried Yosemite on my MacBook Air (testing machine). I think it is ugly, bland, and the most un-Apple-ish OS that Apple has ever released. One of the most irritating design aspects is the RED/AMBER/GREEN window buttons (Close/minimise etc) which look to me like they were designed by a child.

Are there any tricks or methods for replacing the Yosemite rendition of these Mac OS X buttons with the usual ones we are all familiar with?
There are some applications that allow you to change the theme in OS X.

However they might need a little time to be updated for the new UI in Yosemite.

For example Flavours which is being updated but isn't quite ready yet.