Yeah, I don't know WTF they were thinking. Make a joystick/throttle set completely out of metal, except for the supporting piece on the throttle...that's just brilliant. Personally, I like the feel of the TM F-22 handle much better (glass injected nylon) and think they should have made the Cougar handle out of the same. Apart from the obvious grounding issues, I think the metal handle just has too much momentum/weight/whatever of its own once you move it in any direction and does too much to negate the effect of the springs.
I ended up gutting my cougar - throttle and stick, and installed all of the hats and button switch caps into my F-22/TQS combo. It's damn near perfect.