Rage? What rage? Have you all seen your posts replaced by Ponies yet? Then you'll know.
Blood on the ground, sure. Maybe. Maybe not. You miss the point about deep wounds and cuts? The veins snap shut in order to restrict blood loss. People - lots of them - have died from blood loss with little to no visible sign. Soaked up by the ground on which they were lying, dumped into their boots, absorbed by their dark clothes...
Cutting you in half, yeah, you should see blood. Also entrails. And bone. See those? Why am I not hearing complaints about that? Or the feces and urine, since losing control of your bowels is also a common occurence. That water really ought to be quite a -few- colours...
Then, since we're going down this path, you have -any- idea how hard it is to kill someone? Even sliced in half, ( which is -incredibly- hard to do, as anyone who has ever butchered anything knows. We use power tools for a reason.), people can just linger. Screaming. And begging. And crying. For hours.
Most people die from infection and trauma, not the initial injury. That might be a bit much to put in a videogame for now.
Having bounced around a bit in this old world, I've actually seen people who've been shot multiple times, up close. First, hey, guess what? Not that much blood at first, but it does keep coming unless their heart stops. Hard to say how much of it stayed on the ground - being dirt, it soaked it up pretty quickly. Looked like oil.
If the heart stops, there isn't anything to pump out the blood, either.
So, sure, if they were shooting for realism, this whole thing would get a lot more complicated. But this isn't about realism, is it? Just "cool".
And that's fine, but if it such a major issue for you, given everything else that's cool about the combat in this game, ( or supposed to be, anyway), again, let's go back to the stick figures - would you prefer stick figures and blood decals?
Or instead all this other great stuff and decals? I have no idea if your mother told you you could have everything always, but you can't. No idea why they cut it, on purpose or not, repleaceable/fixable or not, but it's a tiny, minor issue against the scope of this huge game.
Perspective.