I'm not a big fan of him indeed, but he's not bad either. He wasn't called for the WC right ? proof that I'm not the only one who find him limited^^ I don't think his set is that harsh. I think Form could go up
His main quality is his consistency in my opinion. Aurier is far over him judging only on skills. But the fact is that van der Wiel is more consistent. He has equal offensive help than Aurier but Aurier is far better for defensive duties. van der Wiel is able to totally missed interventions, or let his opponents go on the side. Also van der Wiel aren't much injured, wich is not Aurier case this season (like player who played the WC, as Thiago Silva or Lavezzi who struggle to come back this seson because of injuries. They played too much with the WC).
About his crosses, it's hard to rate. When I saw his crosses, it looks like he try just to put it on the box, but don't target his partner that well. That's more: "I put my crosses in this space because I know someone of my team will try to touch the ball to score". example of what I feel with his crosses: http://www.youtube.com/watch?v=GHm6SrdvxXk
Some sideback are able to give perfect crosses in the header of the striker on the box. I never found van der Wiel that good to deliver aerial crosses to Cavani or Ibra header. But he make a lot of assist because he put them into the box at the good time. I don't know really. May be a raise on green for LPA. I would say Form and LPA could have a raise, yeah. He could even be low yellow sometimes on crosses but I'm not really sure for his LPA.
This one is great: http://www.youtube.com/watch?v=CQ1wcNilsP0