Like I said in my review, Seven made a grand gesture by remaining on the bridge to face the consequences.
But that didn't lead to anything. All she managed to do was avoid being sucked out by standing close to Jack. She had no agency. Jack did.
I did respect Shaw for saying that she should've blown them all out of the turbolift. She had agency at that point but didn't use it.
I think you need to rewatch the episode.
Jack is the hero of the episode. Seven stood by him as a supportive friend and crewmember, showing care for her crew. She didn't let him face this on his own. From a directorial POV, both were placed in direct opposition to the main villain and had the opportunity to land the defeating blow on her. To me, that telegraphs their potential importance as leads for the 'next next generation' or 'Legacy' if it ever happens (doubtful). We'll find out where episode 10 leaves us off.
And Seven not blowing them out the Turbolift shows some positive character progression for her. Righting of the ship.
In Season One, she literally beamed to a random planet and started murdering people by shooting them in the back, Punisher style. They really put her character in a bad place. S3 Seven shows much growth from that.