Yeah, the best substitution would have been Ando for Kagawa (and I also wanted Hernandez for Welbeck, who was flagging a bit, and had stopped doing the closing down which was so important in the first half), but probably went for Jones in order to not risk Anderson.
It was a classic Fergie management job, in a way. If he'd done things a little differently, we probably could have won this comfortable 3-0. But the entire team would have been completely exhausted, someone would have got injured, and we'd have picked up a load of cards too. Instead we showed we were the better side (comfortably) in the first half, and then did just enough to see it home in the second, leaving us with fresh legs and more options for the next couple of matches.