When they killed Culber off I figured they were going to go down the route of Stamets makes his brilliant calculation or reaches the emotional climax of his story because of the death, the last nail in the buried coffin... so I'm glad that they didn't do that. But that makes his death even more pointless, because the shock value wasn't that Culber was being murdered, it was the shock of Ash killing someone as Voq. It literally could have been anyone.