Yuzuru can play the Phantom. Kana can play Christine the singer. And other skater can play Raoul or Carlotta... so actually it's not that too repetitive if they all choose different session of the musical.
For your reference: Kana chose the "think of me" part of POTO.
Her performance in The ICE 2014 in July:
https://www.youtube.com/watch?v=zVHD-LKGBjs