KQ8 is what, 8 years old now? Ken and Roberta have no access to the KQ8 code or the means to create such a patch.
Didn’t KQ8 even come with an option to change how much blood is shown? I can’t remember. But, the amount of blood is insignificant compared to what you see in any other video game. And it’s not like it’s very realistic either – again, compared to most video games.