I would appreciate changing what her super mode can do. It's kind of hard to understand in my opinion. Sekirei tend to use outside sources for power during their norito super mode anyways. My sekirei for example uses energy to conduct either a super powered slash or to unleash a deadly sharp energy slash. Think of Danzo's Awakening from Naruto Shippuden Storm 3. You can look at his moveset on youtube if you need a specific visual style to see what I mean. 

Other sekirei control wind (mutsubi), gain increased power (Yume), or gain stronger versions of their normal attacks (sekumei, kazehana, Benisubasa etc)