Orlin’s death was not especially surprising since he was pretty much there throughout the episode to convince his niece to re-examine her murderous ways, and that her parents died accidently (and the police case file about it covered up). If Orlin hadn’t shown up to talk Grace down, Barry would be Flash fried.
As her dark matter blade travels as fast as XS, who barely escapes with the civilian meta mom, Ralph and Cisco are unable to vibe to help the downed Barry. As she notes, there was not much enjoyment to be had by defeating Team Flash because it was too easy.
What I found particularly thrilling about Cicada-Grace is how darn good she is at wiping the floor with our heroes.