Funny, after release the complaint was that too many NPCs are essential

But anyway, this is why i buy my Bethesda games for PC, they just can't make one without some

features. I thought the UI was the only one for Skyrim, but now they include them in their DLCs too

The people that complained about the essential npcs are generally not the ones with the issues about the vampire attacks.
Stop straw manning the issue.
They work on bugs, the Vamp attacks are not a bug but a feature that they decided on. Now the massive frequency and difficulty which which people "Say" they attack might be a bug OR maybe the ease and un-frequent amount (like mine) they attack could be the bug. Otherwise they prolly wont remove or change a feature like that just because people cant take responsibility for letting their NPCs die
Again with the insults...
Before you go off about "I didn't insult anyone" you did. There is an interesting thing with language, I believe Noam Chompsky calls it surface structure and deep structure, your insults are in the deep structure.
You implied that the people that have this issue are bad, which if you paid attention to what they say they have no issues with KILLING THE VAMPIRES they have an issue with the NPCS ATTACKING the vampires when it's 100% guaranteed to end in their death. Then you mention "not taking responsibility" when it is NOT THEIR FAULT. It would of course be their fault if they, themselves, killed the NPCs, but since that is NOT happening it is not their fault.
Unless of course you want to argue that it is their fault because they insalled the DLC in the first place...but that's not going to get you anywhere.