by the time I was about 3/4 to the end, every boss battle would devolve into characters lasting ten seconds before they were dead only to be revived by the auto-item system, only to be dead ten seconds later and repeat a dozen times since Life Bottles were given out like candy.
I played Xillia 2 on hard the whole way and the last boss in his final form was just ridiculous.
His normal attacks hit for 20,000 to 50,000 and his MA did about HALF A BILLION
None of my characters had even hit the 9999 HP cap.
I rolled around with Ludger, Elise, Muzét and Leia on that fight just to have a gazillion revive spells.
I could complain more... but the difficulty was actually on par with its name and I did do it on the first try so I guess it was balanced correctly.