I rank this a “D”. As much as you beat Xemnas, you got to avoid more of the attacks Xemnas has thrown at you. Those vines are part of his attacks too, even if they don’t come off his hands. Other downgrades: (1) you died in the fight thus needing your Kupo Coin to save you. (2) missed several openings that can be created using your reprisal at the correct moments. (3) lots of missed attacks due to mashing attack while in Ultimate Form.