Short answer: yes, she's good.
Explanation: Look at her tile buff. It buffs ARs, not SMGs. That's a 20% damage buff. Plus, her skill buffs everything in her tiles again, with not only a DMG buff, but a RoF buff. We're talking 45% damage buff (possibly 50%, but i'm not sure if it multiplies or adds to the buff) to the other ARs. Slap her in a squad with g11, and g11 will turn into maxed RoF super damage RF.
tldr; Think of her as a super M4A1