Well the idea is good, Hybrid Vigor is a thing that most of the "Racially Pure" morons tend to ignore.
Still, better off not comparing the specific strong points of other against the apparently more balanced stats of yourself.
I could be wrong, but as far as I know, the hybrid vigor concept only applies when the populations that are hybridized are highly inbred, and when the alleles responsible for the phenotype being evaluated are few. That is, the concept doesn't apply to humans, so it ought not to be used as an argument for race mixing, or against racial purity.
That said, I don't have anything against race mixing itself. People ought to have the freedom to choose their mates, whether within their race or outside of it. But reproductive freedom ought not to be used as an argument for unwanted colonization of nations by foreigners. Why are we talking about politics on an anime art sharing website? If we talk about anything, let it be the art.
Half-dragon girl's mom's hair is super-cute, I gotta say.