She was part of the group of 5 stars, where they tried out new things to see if they would work. Unfortunately, the wonkiness of how she worked and not playing into how battles played out, AT ALL made her shittier than even the mediocre 3 star RFs. RIP wasted design.
With the revision, it's even worse now. You can literally improve her DPS by turning her skill off, due to the aim time taking longer than normal RoF while still dealing only 1x damage. ...And it still generally doesnt get to punch through stuff.