There should be a keyboard shortcut that opens the shortcuts window!
The point of shortcuts is utilizing the keyboard to make things faster. At the early stages of using this app, the shortcuts are hard to memorize or get used to. Thus, one would open the shortcuts window several times until one knows what the shortcuts are. This is a little slow. If there were a keyboard shortcut to open the shortcuts window, then it would be almost just as fast for new users until they memorize the keyboard shortcuts :)
Your welcome and I love you guys