I played an EotG at the same tournament (can't remember whether it was the same guy or not @Chris Tomlin?) He got it twice in a row - without me getting a response. This gave him 2 additional rounds of scoring. This was duality of death but, with the exception of Bore Draw, it'd be the same on pretty much any of the GH2 scenarios, especially as this was at the beginning of the game.
He rolled some dice once we'd finished. It happened about 1 in every 4 - so once a game. To clarify, because of various buffs, he needs one 5 and two 6s from 4 dice, normally with the ability to re roll as many or as little as he wants of those. Happens more frequently than you'd think.
I don't think it's a broken list - I ended up finishing higher than him, I think. It is one that when it comes off there is literally nothing you can do against it, which doesn't seem very fun.