As were the Shin-ra troops at the end of CC, you can't die in that fight either. And if you take away the Auto-Phoenix, Yu Yevon is hard if you aren't prepared for it. If you have Zombie Attack, he's pathetic.
Thought it was well worth one playthrough, but didn't feel like doing a replay for some reason..maybe one day. I would reccomend it as it really is worth one playthrough imo.
I heard they might add a new game plus to FF13 as DLC, seriously hope that isn't people having a tease. They definayl should have done that for X since I never wanna have to dodge lightning for that weapon ever again