In fact, in the gif that´s exactly what he does, turn around and pass it 5 yards back to Mata. And imo, as usual, it was exactly the right decision. As for losing the confidence in attack as a winger, I´d say your right, and a massive part of why he´s been brought back to right back. Take some of that pressure off. I think he and Mata are a good compliment to Young´s attack on the left.
I trust his decisions. After all, he´s a professional of Man United standards, has been for years, and not some self important punter sitting in front of the telly being hyper critical. LVG seems to trust him and rate him highly.