I personally think that the PHM fandom(And Bloodymary folks too, it'll be funny) should get more mileage out of the fact that the way Grace was called in to assist on PHM, and how he ended up on the ship, and seemingly a bunch of other shit, was higher-ups going:
"Well. Fuck. The backup plan for our backup plan has failed. Do- Do we have literally anything else available? ANYTHING? Dear god, ANYTHING else?? ...no? Fine. If -and only if- he's our last remaining plausible choice... Send in the Freak."
And then Rocky was the only one on his ship to survive the radiation... Because he was off by himself in a workshop, not leaving or interacting with the rest of his crew while the all died of radiation poisoning? Yeah no, I don't buy it. He could not have been the only engineer on that ship. Uh-huh. He was 'so busy with work' he wasn't out in the contaminated parts of the ship. Totally not just a social outcast who people didn't like very much. Totally.
And then he shows back up on Erid later like "Yeah, of course I'll help solve the Astrophage crisis and start our Taumoeba farm... After we get my squishy alien friend here housed and fed and such. What's that? The entire planet is in danger of dying if we delay? Well, then we'd better hurry up on getting Grace sorted! If he dies, WE ALL DIE WITH HIM. :) :) :) :)"
Imagine Bloodymary where they get abducted the COI, and they think HELL YEAH, TALENTED SCIENTIST. And then Simon stands behind him shaking his head feverishly. Like, NO. NONONONONONONO. DO NOT TURN EITHER OF THEM LOOSE IN YOUR LABS. And if either one of them starts talking about making 'improvements' to the life support systems, FUCKING SEDATE THEM.