Euler Rotation Problems

Recently I've been having an issue when animating that a control will flip 180° or 360°. This usually occurs for me when I am matching FK/IK manually or animating a character turning around.

You can see the issue occuring here:

Very annoying - especially if to fix it you go in frame-by-frame. Fear not, there is an extremely handy and seemingly magical button in the graph editor called 'Euler filter'. It is located under Curves>Euler filter. Select the problem keyframes, hit this button and voila! Like magic, Maya interprets the information, and prevents any curves from exceeding 360°. Perfect.

Why this isn't a MASSIVE button outlined in red I don't know...