Title pretty much says it all. Personally, I think it's extremely disappointing when there's hardly anything to do with crashed freighters and ancient ruins besides a bit of digging for items that aren't even that valuable.

If they both got the instanced dungeon treatment like derelict freighters have I think that'd be exciting. Then crashed freighters and ancient ruins found under water could be different than their above ground counterparts.

Ancient Ruins could deal with a lot of archaeological discovery, using the terrain manipulator to dig into rooms and uncover chests and the like. Keep the finding keys to open up the big chest mechanic as well.

Crashed Freighters could be nearly the same as derelict freighters except the dungeon could be on its side or off kilter and with more hazards like loose wires and fires. More navigation with the jetpack would be required.