86 is deceptive. The characters they killed off so far are just props to develop part of the core group of characters. If anything it’s been said the anime showed more of them. I’m only on light novel 6 so I can’t say anything beyond that. I wouldn’t compare it to Attack on Titan that at times bodied major characters. It’s also not as deep in the game either at that was when major characters were killed.
I’m expecting 86 to convert a major character into an antagonist. I dread it but expect it.
War-type plots usually have that. One person wants to get out of it, while another makes it worse because their life has revolved around it.