I'm wondering about how NPC deaths should be handled.
In Oblivion, Fallout 3 and Skyrim certain NPC's were tagged as essential so that they could not be killed.
Other NPC's that can be killed are killed then they don't come back.

I know that it's not the same developer behind TESO, but I'm still curious as to how people want it to be like.
For example, if I want to be an assassin then it really gets on my nerve if I can't kill certain NPC's.
So I want to be able to kill a major quest giver, he is not going to be easy to kill, but I want to be able to kill him.
How should they handle this?
Avoid being able to kill any NPC's at all?
Respawn? If so, how long?

Personally, I want everything to be killable, but I want things to respawn after 1 hour.
If it [censored]s things up for other players then so be it, limitating my choice in who I can kill is bad design, RPG-wise, IMO.

..............your last paragraph pretty much answers why you won't be able to kill every NPC.

there is no radiant AI in this game at all

It could answer the question, but it could also not answer the question.

I can agree with his idea, it would make the game world that much more RP-able in a sense.

Well it ain't really an RPG if we don't get a choice to do certain things.
If someone repeatably kill off all NPC's at a starting area the person could get warnings and get banned for 1 week or month if they continue.
Abusing this system should be punished, but doing it from an RP perspective should be available.