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Also putting it out there that the portrayal of x character is independent from fan reaction anyway, so this is pointless.
It's indisputable really, that Shikinami is a version of Asuka with more plot armor than character. More powers, no failures, this is what we call good treatment to the point of being a power fantasy you'd find in fanfiction.
In terms of portrayal, the character is now "cool", "cute" and "awesome", it's perfect fanservice.