In depth? How? When you get a certain animation, something flies off, something spills out. Not exactly in depth. In depth would be if it were totally dynamic, not set animations. You're in control of your character, they've said if you murder everyone in a village, eventually it will be repopulated. The idea of someone playing a psychopath has clearly been considered by them to the point of adding that feature, so I don't buy the whole "When that isn't the point of the game". It's an RPG, the point is up to you.
Sure, but this doesn't address what I said about decapitation, and throat wounds. The human body has a lot of blood, if the argument is realism, then this should be considered.
It's called detail, no single detail is a huge part of the game. You can argue that about adding any little feature. Rare doesn't equal impossible, and again, you aren't necessarily going to be focusing on the battlefield in terms of killing people. That's up to you. Assuming that about the player isn't a very "RPG" thing to do.