1 - The sound:
I come from games where it's impossible to be completely quiet (e.g. Rainbow Six Siege). No matter what movement your character does, it makes a sound. It's still irretating for me that someone can sneak up behind me without noticing / getting any sound.
2 - Damage / Headshots:
I'm used to that when 1 shot hits your head, you're dead. No matter what weapon. Sometimes I hit someone in the head with a pistol, get the sound that I hit him and then I think he's dead, but he's not. That's confusing. (And then there is the Operator where you don't even need to hit the head).
Anyone else who got the same "problems" with this game?