Pretty thorough write-up, T Man. I agree with no combat. Equipment failures and space/environmental hazards would provide plenty of tension. Less button mashing, too, so easier on the joints. Maybe in a way later version of SE there could be lava tube/cave system exploration too.
I'm not sure how crew management would work, though. I'm assuming they'd be premade. But...would they talk to each other, or at least about each other? Would the player be their absolute respected commander by default or have to gain their respect? I think the video game Divinity: Dragon Commander could be looked at for inspiration. Each crew member had arcs the player could guide them on and could ask for their thoughts on things and other crew members. They could be sent to do things and depending on what's happened to them or whom they were teamed up with different results could occur. Some of them were really surprising/unexpected and it all had consequence.
That'd be a ton of work, though, and some players wouldn't want to deal with that, so there could be a simple crew management option.