Again, disagree here. She's hyper competent, but nothing she does is truly unreasonable. She doesn't 'intuite based on no evidence" she makes the reasonable guess as to what a nuclear scientist would first do. Legasov said it himself, boron and sand is the most immediate and obvious solution he could think of. As far as having a pre-emptive code with the lady might be a bit out there, but I think it only feels as unrealistic because we don't live with our lives monitored the way the USSR was. If you're phone is constantly monitored, then it's not unthinkable that people would develop coded language to get their messages across privately.I do not think however that the issue is having one character representing many, but having a character representing nobody here. Ulana doesn't do things several people did, she does something that didn't happen, in ways that aren't credible, to counter a menace that is portrayed in exaggerated, bombastic terms. It's as if history wasn't good enough. That's what bothers me, really.
And can you specify what didn't happen? Because from what your talking about, I can only assume you mean the Steam Explosion risk, which was something that did happen, it was just that it was exaggerated.