The main thing life did wrong was lose.
Lets be honest, without those early crappy rounds, this could have been an entirely different war. And if we had beaten nyma the second time? We would have had a fractal deck, and a nova/graboid deck, and our firestall would have been better. We could have easily come in second.
Honestly, I can't think of much that we explicitly did wrong. Sure, we never /ever/ PVP tested our decks (or if we did I missed it, sorry guys ¡^_^), and that drama with nyma stunk, but I think things went pretty right.
Oh, I regret trying to take rustlers over graboids. Boy, would THAT have been a mistake.
EDIT: Almost forgot. I regret not making my propaganda speech better. The fight I had with Zeru is something I sincerely wish could go away, and an extra 12 cards would have been soooo cash.