Those games are shooter-slop anyway.

I can't remember the last time I cared about voice lines in Quake or Unreal Tournament or any other multiplayer shooter.

It's not an RPG or a rich-story genre game, so who cares.

I don't know if that's what you were already referring to, but for me, the shout-outs for "Double Kill, Multi Kill, Ultra Kill, MONSTER KILL!!!" account at this stage for probably a majority of the nostalgia for the original Unreal Tournament. Of course it didn't hurt that the game was phenomenal and a great fit for its time, but still, I think that the quality of voice lines can make or break a game.

I kinda see your point. The warm feeling of knowing a real human told me "die, bitch!" isn't a feeling I've ever taken away from playing UT.

On the other hand, lots of AI-generated VO is very easy to spot, and sounds awful. It stands to reason it could meaningfully take away from even a completely plot-free game. If I were a voice actor, I'd feel insulted that anyone would find it comparable to my work.

Arc Raiders has NPCs in the game hub which deliver quests and exposition, its not entirely within the context of a raid.