Who is this "we" you speak of? I managed to beat Yiazmat in FFXII without too much difficulty, it was just a bloody long series of battles. The difficulty was stripped right out of that battle by the fact that you could leave and pick up where you left off. Now, if you had to beat him in one attempt, that might be another story...
I wholeheartedly agree with you that it should be the International Edition, but I'd settle for even the standard at this point with minimal grumbling. It's about time Square Enix re-released the best FF game of the bunch, and the only one not available right now on a current generation platform...