A small plot hole I haven't seen others mention: Robert would probably recognize Saito
As Saito is one of his fathers biggest competitors, he could recognize his face. Not saying that he couldn't go at all on the mission, but I do consider it a minor plot hole that this isn't mentioned at all by any of the characters. A good time to mention it is when they try to persuade Saito not to come on the mission, they would then use it as one of their arguments, but he still wouldn't budge and would go on the mission anyway. Then maybe they could do something more with it later in the story.
But yeah, not a plot hole to do with the logistics of the concept or anything, as I'm sure all of that stuff is a dead horse at this point. But a thought I had as I was watching the movie just now