I was doing Riven legit with my clan, I know it's not popular to do so but we love the fight, and the second phase theme starts right when you got to pop 6 of her eyes simultaneously, works as intended
The thing is the music reverts to phase 1 theme after dropping down the real damage phase, and we never get to experience the absolutely great soundtrack ingame
I know it's nitpicky, but music is a huge drive for me in any game, and I'd like to experience the encounter in its fullest