Weirdly enough, she only killed Dr. Ambres despite having the capability to take out at least one member of Team Flash.
Whatever is going on, Team Flash is going to struggle to bring down Grace.
Was that just for story reasons, or did Grace have a reason for sparing everyone else?
She’s got some additional abilities her uncle lacked, and was able to take on Cisco, Killer Frost, and Barry with relative ease before blasting them all back with her abilities.