>>533839228
If you write Nicole as one of the last humans (possibly a distant relative of the Robotniks) it could still work.
In fact >>533786136
>Why does Robotnik's plan specifically require a five-year old's brain?
>Why someone close to the royal family, of all things?
These issues are resolved if Nicole is a rare species and the mind-upload tech only specifically works on humans.
Plus,
>How in god's name does Nicole's device-controlling powers extend to telepathic control over sapient organisms?
The 'human spirit' logic.
>Was the future Nicole was scared of one where she oversaw the Roboticizer, or was she going to actually overtake Robotnik and become even worse?
Could turn this into Nature vs Nurture if she's a descendant of the Robotniks.
The remaining issues are still outstanding but it COULD have worked if done right.