Well, you said the conversations are also mature therefore the visual reduction in gore will not fulfill a purpose, and they should move onto another game...............
Well as I said if it's just "turn off blood and nudity" then it's easy and I definitely have nothing against such a thing. I just wanted to tell OP that it's probably will not solve their problem.
I've actually started to play violent games since I was 10, I think. So I see no problem in teenagers playing such games but it's up to parents what to allow their children. I just don't want censorship to go beyond toggle off blood/nudity.
