Using penalty kicks to decide the game is like defunding a basketball game with a free throw contest. Boo
I still love the concept, and I think Roy shared it years ago on this board, that in OT you should remove one player from each side, every five minutes.
If no one scores, eventually you'll get down to 3-v-3, 2-v-2, 1-v-1.
Could you imagine the drama? Once you get down to 4-v-4 or 3-v-3 the strategy of keeping a goal keeper in the net would probably change.