Overall I really enjoyed this episode, I felt like it was a good 2 episodes worth of episodes merged into one.
If they had written Wally better I would've been very happy with how they did everything.
When I look past the fridging of Iris West, her death was very emotional and one of the better ones that this universe has given us. Though I 100% doubt that Iris is dead so my emotions aren't as worked up as they would be if it was a Laurel situation all over again.
Having Snart back was great, hopefully they keep finding reasons to bring him back since he is a waste of a good character. Lyla was great even though she didn't factor into the episode that much along with the King Shark joke.
Yeah that is one big grade off of this overall story/season. Iris has been a guest star in her own death story. It's been driving majority of it and she has had nothing to do besides prop up Barry.