There are ......
I think Zhu, Yan, Ding, Gong, Li, Wang played very well. Zhang played below her standard because of injury as you said. I think Yuan played very badly in the semi-final. Her height is more than 2 meters, but she is too slow and don't know how to block. She is not a good middle blocker at this level. I don't think this is her fault, though.
Who should be blamed for the "failure"? I think Lang Ping selected those players to play for her system (every coach has a system). If a player didn't follow her order or didn't play well, she can choose/sub another player. Therefore, if her system didn't work, she should take the responsibility. She was one of the best coach, but I think her level dropped a lot in this WCH.