Just in case you do have players still arguing Wedge gets a free action Full Pivot, here's the reply I received from Alex at FFG. It does require an action.
"Hi Daniel,
Wedge, when used, allows the unit he’s equipped to to pivot up to 360 degrees (instead of 90 degrees) when it performs a pivot action. It must still perform a pivot action, it does not get a free 360 degree pivot.
Cheers,
Alex Davy
Game Designer
Fantasy Flight Games"