No, she is really powerful. I thought Midna was strong, but I used Fi once and she is insanely unbalanced. About the easiest mission yet, just because of that choice.
yea, i found midna OP too
i played as Fi first and she was insane, literally just spam Y and press X whenever and you don't get hit
then i played as midna, same thing really, but Fi has a lot more goin on than Midna.
Happy that Midna is at least somewhat OP 'cause i really like her, but I prefer Fi over Midna LOL