Aaahhh yuri!!! Would've rated it higher if not for 2 things:
1- We didn't get to hear the members play as much as the previous seasons which was frustrating. Though maybe that was the point; to keep the viewers lookigng forward and anticipating the final performance.
2- The fact that Reina choosing Mayu made no sense. After all, she said many times herself that Kumiko is better and while kumiko has akmolowdge that her confusion about her career affected her playing, she had already made up her mind about her career path by the time of the soli audition vs Mayu. So she should've played as well if not better than what Reina was used to hearing. In the end it seemed like a forced plot line for additional drama and tension.
Overall 8/10, very enjoyable and fun to analyse as each character is written so well and their interactions are all so interesting.