Simulacrum..

All of your points are valid.

However, I just really want the person fired that thought it was a good idea that simulacrum mobs despawn instead of die at 0 HP, meaning sooooo many skills that rely on monster death or on corpses don't work.

Again, that person needs fired. He or she should not be a game designer.

GGG has no idea what their "Vision" is. They have things in the game, like breach and sim, that counter what they say the "Vision" is. Because of this, the game feels like trash.