Watching videos of the endings after intuitively getting the best Romulus ending, it seems like a lot of people miss that you can save the Administrator if you took a copy of the Potagoras P.A. but I don't think the endings reflect it. Also, doesn't the endings feel a bit cheap and rushed after the rest of the game?
I noticed that the art slides were getting uglier in chapter 4 and 5, the Romulus positive ending looks less clean on the edges, almost as if it was a colored sketch, than the Remus one. This was rushed since the story makes little sense
I got the same ending. Mostly because I was in orbit of Remus taking my sweet time. Then as the enemy ship got close I moved the Ixion expecting it to follow. It destroy Remus instead.
Romulus ending does reflect it but as you said it's cheap. Instead of cryopod (0:23) you get image of Eden P.A the same image (2:25) you see in Remus ending. I doubt administrator is even a human, more like organic brain that is connected to Tiqqun your science team lowkey confirmed it when they ask to disconnect Eden from Tiqqun.