I just see the end of Juuni Taisen, yep, maybe unsatisfactory for the viewer but properly for the circunstances and the character. I say, what are we for decide which wish is better? he won the fucking war, so he chooses. I personally would have write a list of powers and features in a paper, handled it to the master of ceremonies and say him: "Turn me in an immortal beautiful loli with all this powers", but this is only me.