Francis K. Lalumiere
While I agree the card is pretty powerful, the mechanics of the game are great in that they allow you to squash the "leader" by ganging up on them for a few rounds. As long as you're playing with 3 or more players (which I think is the only way to play this game) you have pretty good control on stopping runaway victories.
It's a rare thing to see a "gang up on the leader" mechanic lauded, but in this case it's fully justified.
And I agree that the game stinks with only two players. As soon as there's a breach in the defenses, one of the players gets clobbered to no end.