It looks like that length accomodates the ball of your fooy correctly. I wouldn't go any longer- Maybe try a width up. A 1" spread is at the edge of acceptable spacing, but it will close some over time. The spread doesn't look so wide that it's pushing the topline back and out, so I don't know that I would bee too concerned.
I agree with these guys. I really think you should judge the fit with your eyes closed. That said, even with eyes open this is not unacceptable. Continue to wear them and they'll close a tad more.
Maybe not ideal, but better then going up in width and having a heel that slips. Up a width may work better for him, but without knowing for sure, I think this is fine.