We should wait to see the circumstances.Natalia is very conscientious in her job.Who's to say that Natalia did anything more than bring something to light that the tech was doing,or she found out the tech was covering up mistakes etc.
As far as being a complete liability in the field,not more than anyone else.
Don't want a fight, and it's just my personal reaction to the character, but I don't like her, and I don't trust her judgement - 'being conscientious' could well mean not supporting one of the team... I wouldn't want her to have my back, that's for sure. Of course they all have flaws, and they've all (occasionally) made bad calls. And yes, it makes them more interesting. But I wouldn't say any of the others is a liability. And it's hard to forgive that she's nearly got H killed - twice - Sleepless, where she nearly took his head off (fortunately, she's also a bad shot), and Mayday, where she's so fixated on North and his children, that she leads H right into a trap. Anyway, as I said, just my view. We can't all like all the characters.