Random quests, even repetitive as well as different world events(recurring) >>> story campaign
You can't have actual story, you can have some lore, but not personal or world story, because once that ends, you're left with that empty feeling inside and subnautica as good as it is is prime example of that early burnout due to completing story.
I'm voting quests exclusively because there is no separate option for them, but I am NOT supporting main story at all.
Plus, actual quests and "story" around them should require different resources then smooth terrain, which is mostly programming, while quests require much more planning and balancing designer role.