Just an opinion from my side. What I like to point out is that just like in 'real life', things get implemented because people want to work on it, not because people 'should' work on it. In this case seZereth wanted to work on some extra effects, and he thought blood. No it is not necessary, but yes it adds to atmosphere. The whole fighting animation could also do without the scene of enemies falling to the ground but I have grown used to it and the game would not have the same feeling without it. In fact, now that I think about it, it reminds me of Diablo II. I would even stop the playing for a moment just to see the animation (lightning and such) of a major boss, as a reward. Maybe combat animations serve the same purpose.
I don't mind extra effects, I'm not really impressed with the new blood graphs but I can see myself grow to appreciate it. (I am not 'not impressed' because the new animations dont take the focus, not because you did a bad job SeZereth) BTW maybe skeletons could use a dust or splintering effect in combat.
Edit: edited the double negotiation in last part