It doesn't add anything narratively to be dark just because you can, or to leave the audience feeling nauseas and grief-stricken because their beloved characters have been tortured to no meaningful end. It isn't darkness that makes us love BSG, but rather the characters fundamental heroism in spite of their dark impulses. I'm just afraid that we aren't going to care for these people by the time they ever do dock on earth . . . .
But like Nicolosi says at the end of her post, "there is still time."
For more on what this blogger thinks about BSG, see a collection of relevant posts here.bsgctgy