I don't know if things have changed since I started my game, but I very clearly recall in the beginning have a very limited choice of Latina assets. That may be one reason this well isn't too deep yet. Now that may have changed, but to make Lupita we specifically had to find one we felt was close, and then do a bunch of our own modifications and alterations to the skin to close the gap.
Hopefully that's not the case anymore because I think every game needs a Latina!