I would like to point out that I did not re-start the "Damage on a Miss" argument. I stated that Graze was "Damage on a Miss" that it felt like it came from 4e, and that I did not like it. It was the forces of the 4e supporters that immediately came in claiming that people the don't like it "just can't understand what Hit Points mean!" Like that is not an insult.
Yes, I do understand that Hit Points are not "Meat Points." I understand that not all damage has to be physical for a character to lose HP. And calling it Automatic Damage doesn't make anything better. It is Automatic Damage that I don't like!
Say you have had a long fight and your characters are running low on HP. The bad guy moves in with his giant "automatic damage" sword. There is no tension. There is no chance he is going to miss. He is either going to do a lot of damage and drop you are a little bit of damage and drop you. There is no reason even to roll! I want there to be at least some chance that a character can miss and do no damage.
I also don't like it the other way around. Greatsword is, once again, the best weapon in the game. Because it cannot miss. It does automatic damage. A couple of martial characters with greatswords are going to do a guaranteed 16 points of damage to the BBEG every single round, minimum. I just don't find that fun. Others are, of course, free to feel otherwise. That doesn't make my sense of fun wrong.
But Fireball!
Yes, that is why Fireballs and other area of effect spells are terrifying. If you know that the bad guy can cast Fireball you are in trouble. Unless you have evasion, then it can "miss" or more accurately you can dodge the effect. Or you have immunity to fire. Or he is out of Fireball spells, since it is a limited resource (greatsword swings are infinite). Or some other way of avoiding the damage, like spreading out so not everyone is in the area.