Which makes it even more cringe worthy, except for the partner AI thing, that's still bullshit in every game.
Lazy Difficulty
...
Doom should've set the standard on difficulty levels; instead of changing damage output or health it changed how many enemies showed up. I mean shit, with modern source ports you can even control items that show up.
If going this route, I'd say jack up the enemies general defense everywhere on their body except the weak point to make sure good players get rewarded really well.
Stalker does it really well and makes the game deadlier for everything the higher the difficult is jacked up.
Shame Rare used this a lot in B-K and DK64.
It doesn't make a big difference. Bungie themselves said that heroic is the way to play the game, so it doesn't take a genius to realise that legendary is just there for its own sake.
Pretty fair, just give them 1 super weak point and 1 or more regular weak points to not make it tedious.
As for Doom, it basically gave you a certain variety of enemies and you had to prioritize according to your skill.