This is how my venue runs things as well. I love it, it feels very even no matter who started the match.

It's all a question of which you find more 'fair'. A player running out time when just one more turn would let their opponent win, or a player taking a desperate last shot that they might not have taken otherwise in an attempt to win.

This is indeed true. No system will be perfect.

I do remember one game I was judging that had an epic outcome because of the "Full Round" rules I was using.

The game was far more interesting for both player because the player had to make a choice about pushing and possibly to his KO click on his last action.

While some people might think thats outside the scope of the game. I remember the tension and feel of the moment was very much HeroClix to everyone who was watching.

My venue lets the active player finish the action they are on, or if no action has been declared they may declare ONE single action. Its basically one last chance to attack an opposing piece.