Id like to see some unique persistent items that only one player at a time can have in there possession. Maybe the Rosetta Stone was stolen in 2400 and is floating out in space somewhere. Maybe a player finds it can sell it for a huge sum of money on the black market or another player kills them and steels it, or leaves it hidden on a remote moon. There's a whole list of possible persistent missing treasures that could be used:
https://en.wikipedia.org/wiki/List_of_missing_treasures
Id also like to see the galaxy seeded with missing persons with big rewards from families for example for returning escape pods. Maybe a missing persons board with last seen details. Also the escape pods should tell you if the person inside is dead or alive. A family could still pay a large reward for returning an escaped pod of a family member even if they been floating in space for 5 years. It would surely add some more variety to the possible signal sources when you're out exploring in deep space. Also kill missions could be kill or capture with more reward if they are returned alive.
https://en.wikipedia.org/wiki/List_of_missing_treasures
Id also like to see the galaxy seeded with missing persons with big rewards from families for example for returning escape pods. Maybe a missing persons board with last seen details. Also the escape pods should tell you if the person inside is dead or alive. A family could still pay a large reward for returning an escaped pod of a family member even if they been floating in space for 5 years. It would surely add some more variety to the possible signal sources when you're out exploring in deep space. Also kill missions could be kill or capture with more reward if they are returned alive.