Unless I'm very much mistaken, that is just a normal Miqo'te child. The developer comment re: Lalafells was an aside in reference to how certain people, roleplayers included, choose to play Lalafells as substitutes for character models of children. "Their heads are too big to use them as kids," essentially.
I don't see "Lalafell-Miqo'te hybrid" anywhere in that dev comment.
I don't see "Lalafell-Miqo'te hybrid" anywhere in that dev comment.