Good point and, yes, you do have the right picture, mate, but I'd have to disagree. Our primary tactic was to move ball down the wing and cross it in - I think that's what was said from Moyes. It's nothing different to the Liverpool game. In truth, it caused us a lot of problems building from the back. At times, we hoofed the ball up, which is really frustrating. I mean, take a look at our first goal scored. This is genius all round from Carrick, Januzaj, Nani, and RvP IMO:
Already, as displayed, there is midfield superiority for Sunderland in their own half. Nani drops deep to collect the ball from Carrick, but it's a 3 v 4 situation. Usually, it would be 3 v 3, but due to Giaccherini being infield, it gave them midfield superiority. It was this narrow shape that worked against Sunderland at times because it meant we could use our width. In taking a narrow, compact shape, Sunderland left Evra and Cleverley open... And in the end, it was a mixture of movement and width that broke their midfield shape. Note how Januzaj is surrounded by a couple of players, but the movement shown in the later pictures frees him up.
Nani's options are limited, but Van Persie drops deep to offer himself as an outlet. He receives the pass (from Nani), dragging the centre-back out of position, and then he takes up a position centrally to offer himself as an outlet. Prior to this, Januzaj was surrounded by four players, so if he had picked up the ball from Carrick/Nani early on, it would have been hard to turn and switch the ball to the left. Our objective was to switch the ball to the left, but we had to do it in a subtle way. In the third image above, Sunderland have put too much focus on Van Persie. Cattermole's positional awareness was poor in this situation... He's not tight enough to Januzaj, but Carrick's first time ball (IMO, he's the best first time passer in the league) was exactly what we needed. And now, United have a 4 v 4 in the middle, but they've also got two options - Cleverley and Evra - who are completely free on the left, to use as outlets.
Januzaj finally picks up the ball, but now he has time to manoeuvre and pass the ball to Evra, who has a lot of space. Now, Sunderland's narrow shape is completely broken. And thanks to Rooney's movement, Evra had more space than he should have. Against a block that is narrow, the easiest thing to do - to break the shape - is overload the middle and then play the ball wide. Width is imperative and for Evra's poor defending in the last two games, he adds so much to our shape. Van Persie dropping deep is the most pivotal aspect of this goal. That's what I wanted Rooney to do in the first half. It doesn't mean he has to constantly drop deep and pick out through balls or anything of that sort, but there is a massive advantage for us because of the narrowness of Sunderland's block.