So far, I like her. She's not complicated or cumbersome, like I find Vantage with her movement or Seer. It'll take time for people to learn and use her right. Her passive is nice in catching up to teammates. It's not abusive as it's a short speed burst, per teammate targeted, who are out of range.
I see people using her Tactical proactively instead of reactively. It's the same principle as Lifeline - you're not healing anyone who hasn't taken damage. It only works if you or your party lost shield bars, up to 3 bars worth, for 12 sec., regenerated while not taking damage, then goes away. Which means, it's going to be clutch shielding in combat. Faster than 3 shield cells and save on shield resources carried.
Her Ultimate is interesting. At a 1st glance, it's a straight line zone of control. BUT, if you position yourself within the ground targeting circle, standing close to the inner part of the circle, you can bend the direction of her Ultimate to something like a 45 degree arc. Otherwise, it can be used indoor, with less batteries depending on size of the room, BUT you'll get stacking damage, 10 points per sec., spherical - meaning that it goes through walls and floors that it can target. Basically, it'll take out a knocked opponent. And her Ultimate will do a better job at ring gate keeping people with the slow and ticking damage. The only bane will be a Crypto EMPing the batteries. But then her Ultimate isn't permanent like Controller abilities. Just takes time to be creative.