I don't agree. Missing Silva/Kun simply isn't a reason to park the metaphorical bus. I fully understand the rational in the first 45 minutes because of what happened last season. However the 2nd half we should've moved up a couple of gears and gone for a different approach in terms of personnel and playing style. Instead we simply retreated further into our own half. Granted that the rags must be commended on their own defensive strength, but we didn't really do anything to counter that strength other than sit back and play solely on the break.
United aren't Barcelona, Bayern, or Madrid - far from it. Also it's a not quite true to say our defensive performance was down to us playing a 3 man midfield. It was down mainly to Fernando, Vinny, and Otamendi, complimenting each other excellently in the defensive third of the pitch, and our full backs being much more restrained than normal. Toure ended up being a passenger in both halves. Neither any use defensively nor any use as an attacking threat.