Fully being unkillable should never ever in my opinion be added to a agme because it completely destroys everything the developers have done for the game. Such things include a 100% chameleon effect without AI enough to counter it and 100% resistance/reflection to something. Am I against chameleon? No I'm not, but at 100% it should not work as it did in OB, completely ruining the whole point of the game by making all enemies passive zombies doing nothing. Am I against reflection/resistances? No I'm not as long as we never get a 100% rating of it, because that too completely destroys the whole idea of the game. Damage reflection could be made more interesting, less powerful and unique by adding into a sort of lifestyle in the game, being able to turn yourself into living woodo-doll of everyone who attacks you, a max of 45% reflection should imo be obtainable, we should not become gods, only demi-gods and there should also be other NPCs who are demi-gods like us, would really add to the game a lot.
The whole point why I am against OP things is why the NPCs ever had a problem with invasions from OB or dragons in Skyrim when they simply could have, with the help of the mages guild, make 100% chameleon scouts that assassinate everything they see? Or 100% reflect damage and spell warriors standing alone against thousands of dremoras or dragons and just killing them all. If we can do it, so should adventurous NPCs too and if it can be done, there shouldn't be a problem ever again in history of TES. Thus, OP things shouldn't be added in the first place.
Because they couldnt. Not everyone has the highest tier of sigil stones.
Besides, NPC's did use chameleon. Claude Meric, for one.
Nobody made you go for 100% chameleon, a lengthy process involving intimate knowledge of the game.
You couldve capped yourself at 80%.
You shouldnt claim that an intended game feature is OP, and clamour for it to be removed, when it is your own actions that made you have a problem.
You are wanting to restrict everyone else, even the people that enjoy these kind of features, because of your inability to restrict yourself.
Thats not good.
Also, the chameleon suit allowed for emergent gameplay in a way that a capped feature simply never can do.
It was invaluable for instance the many times I followed an NPC for an in game week, to write down their schedule.