my problem with the death of culber is twofold:
1. he died with no fanfare and no emotion. for a character who had been so warmly received by the audience, his death was unemotional. discovery hasn't been a particularly sentimental show, but i really think the show missed an opportunity to grieve culber, or even just feel the ramifications of his demise. the episode moved on so quickly, that moment needed to be bigger and feel more weighty. i know his death will have ripples in future stories, but the moment of his death came and went and it was ugly.
2. discovery is quickly dispensing with diversity. i understand their reasons for killing culber, even for killing georgiou and landry. but so far the series has treated its women of color and now gays pretty terribly. i don't think for a second they have an anti-diversity agenda (clearly it's the opposite), but it's an unhappy accident they need to be more aware of in the future.