He looks like he's really improved his overall game. When he come on, he didn't play on the last man, he dropped quite a lot and got involved in our build up play, which suggests to me that Van Gaal doesn't mind his striker dropping, just as long as someone goes in behind when he does.
Actually, there was a prime example of that when he dropped off, and Rooney ran in behind, which resulted in a Rooney volley. Unfortunately, the shot was blocked, but I guess that's what Van Gaal wants to see. When Rooney dropped off, we didn't have anyone to run in behind.