I don't know if I would say that we gave up. At the beginning of the Round we were ready to face our opponent regardless of the current vault situation. Beyond this I can't really explain it.
We didn't give up. You and Pika have been occupied since the start of War as you mentioned, AK took a week off (the first one, I should mention, due to having holidays... I hope when he comes back he won't start a rampage for our screwing up everything
) and I had an exam that took more time than I would have thought. That, combined with a fair bit of distraction (I, for one, didn't even notice the deckbuilding had ended since some hours ago) led to a big mistake. We could have played some more, we could have possibly even won will's match with a Frogtal. Whatever. We screwed up big time and it means we'll be out one or two rounds sooner than we could have been. Not that it changes that much...
Oh well. I feel kind of sad we didn't fight out this last round, but it's my fault as well for not noticing - nay, not really caring. Good luck to the rest of you in this War, and don't let the ponies take the trophy away without a struggle!