The blood options are located in Scripts/menu/GameOptions.cfg and Scripts/menu/SPOptions.cfg configs for multiplayer and singleplayer respectively. You have these files packed with the latest version of the mod but for some reason the blood option is missing from them. You can copy it from the original game configs.
You have implemented your own fixes for the slowdown bug, which end up halving the firerate of the weapons when paired with my patch feature. I have considered adjusting patch behavior for certain mods but I’m still on the fence about this because (1) it requires extra effort for more content than the base game and (2) I cannot guarantee that this stuff will still work if the mods in question are continuously updated, which brings me to the former point. If I do end up implementing it, I’ll make sure to disable slowdown fixes from the patch in favor of your mod.