Been noticing some thoughts sprouting up around regarding Eternal's story and I wanted to share my two cents; characters such as Valen (The Betrayer) weren't underutilized in the story, he served his purpose and that was the end of it. If this weren't DOOM I'd agree--

But it is and it's important to remember that the story has & never should be the primary focus. In DOOM you are here to kill demons as the Doom Slayer, the plot is there to bring you from point A to point B while the lore adds context for those who want it.

Hayden & Vega are exceptions as they usually don't halt gameplay flow and can help add context to an area, i.e., Samuel Hayden's dialogue all throughout Nekravol Part 1 & 2. Most importantly, neither of these two take time away from what's important, you.

A lot of us believed the Marauder was going to be a singular entity that appeared throughout Eternal's story. That turned out to not be the case and despite disappointing some, he still served his purpose of being the player's rival.

Narratively, if you were interested enough to learn more & read the Codex, you'd find that the Marauders do add weight to the bigger picture. They were the byproduct of the Night Sentinel civil war, a war that was inevitable due of the Slayer's ramblings of demons.