They want a second main girl that
>Can hang out with Amy and be her equal unlike being a child that needs babysitting like Cream
>Is cool and action oriented
>Doesn't offend feminists
>Family friendly design
>Uses purple colors to contrast with Amy and is also usually the color used the other main girl of franchises

Ah yes Blaze could perfectly fit all these checkboxes- No we will force Rouge into this role instead because of autism