i actually really like this, although i think that there should be a non-turn counting way of calculating wussiness.
if any minifig dosen't use their action for the turn, or does the same series of movements over and over (hide behind a wall, fire, re-hide as an example), opposing team players may make a wuss check. similar to a heroic feat, opposing players roll a d6* to see who's right. if the player who declared the wussiness wins, the targeted unit or squad or group of similar units (units who were all doing the exact same lame thing), any player can use heroic feats to kill the wusses.
*almighty bennies DO apply to this roll. players who deserved bennies know more about the spirit of the game, and therefore can have more leniancy on being a wuss, as well as more ability to call out a wuss.