Yeah, I think that some explanations are needed for his Response and Stamina, Jason
When making stats for other leagues, I feel it is best to try to go by their standards. And if you look at the River Plate MF....Abelairas and Agusto Fernandez are both at 77....and I felt in Defense Domingo has some of the worst display of Def/Res I've seen in a while. Not a clue!! But he is good at transitioning into attack, and really showed potential of a deep-lying MF in the Serie A(was loaned to Genoa, but did play), if he can become competent defensively.
As for Stamina, again Abelairas was at 82 and plays a ton more minutes than Domingo. And 82 fits for Abelairas. It wasn't very scientific, but he played I think just 1 90 min match, and I watched it, and there was minimal running involved.
I hope that explained a little [sorry it's 4am here, and my brain JUST stopped working]