Does flipping the coach off count as a "worst mechanic"?
The team control signal has become much easier for me. I usually point instead of use the closed fist thing. You have to verbalize the TC foul well or no one will know what is going on sometimes.
The player control foul mechanic is probably the toughest for me. I don't have any trouble calling them, but putting your hand behind your head is just awkward to me, and I've watched too many college games where they simply point the other direction, so I end up doing that sometimes.