The issue isn't permadeath no-save-at-all. The problem is with your setup you are either running around with the shield on all the time (not my style) and/or with no stealth at all. I'm pretty sure you are getting instant kill quite a bit by grenade/sniper aimed shot/xbow shock bolt. Sure you can just quickload or load up an autosave and stealth approach alpha strike out of them but this feel very cheaty to me.
After thinking about it, yes this is a viable approach but definitely not my style.
Why is it "cheaty"? Did the game or Styg ever claim you are not allowed to die once? I cannot understand this obsession over "no death". It is a game. Fail some win some and enjoy the show. Leave this "no fail" to real life where it happens plenty. Let us have some fun in a game.
Oh, no one is saying you can not play the way you like. It is just that people have different ways to enjoy the game, and when you say that evasion is useless, that is not correct for other people who like to play otherwise.
For me, it is about immersion.
I like to roleplay, and dying and reloading a lot, it ruins the sense of playing an actual guy who is trying to survive in a hostile underworld.
To have pre-knowledge of all encounters, to know what the enemies are going to do because I have already walked into their ambush and died, it changes the game from an immersive RPG, to a technical exercise, wich is a lot less fun and nerve-wrecking.
That is not the way I want to enjoy such a game, personally. I have acual fear when walking into a dangerous situation, and have to trust in my skills and equipment to not die. I love it. I also understand it is not for everyone.