Reading the posts above has me thinking "aah sh*t,maybe he is the new Kagawa". And also the link to him being indentified as a Moyes pick(correctly) has me thinking "well Van Gaal always wanted Strootman".
He is a fine player and so is Kagawa. Undoubtedly Carrick has been our best midfielder in the last 5-6 seasons and since Scholes and Giggs became too old to be able to play week in and week out and since Fletcher's illness, Hargreaves' injuries, Anderson's laziness and Cleverley's inability to make an impact in the first team, there has always been a question about who should play next to Carrick.
Some would say that we need a player like Vidal, a ball winning midfielder with high energy levels and incredible stamina but that discussion doesn't belong here. Ferguson's choices indicate that he wanted a player who could operate as a play maker in deeper positions and do his share of defending but most importantly with the ability to carry the ball through the midfield and provide key passes, through balls and goals in more advanced positions. Someone like Modric or Schweinsteiger.
It's amazing that since the Anderson fiasco we haven't bought a single ready made player who can come here and do the job from day one. Instead of that we kept signing #10s (Kagawa, Mata and now Herrera) and tried to turn them into CMs. We were also linked with several other players these past few seasons, like Kroos and Sneijder, who are also better when playing in more advanced positions.
From what we've seen so far Herrera seems to be adopting to the role better than all the others. The game against WHU, where he played as a right box-to-box midfielder was his best with us. He was very good for 60 minutes against Leicester too until his energy levels dropped dramatically. He has also been decent in the 3-5-2 but his communication with Rooney and (especially) Mata wasn't good. But he still needs time to learn the position.
So, when you're thinking that LvG wants Strootman, or a similar player, you're absolutely right. Our slow build up play cries out for a player like him. He has the physicality to help us win the midfield battles (we use Fellaini to do that right now) but he is also good on the ball. If we finally do sign a player like him, it doesn't mean that Herrera will be benched, he will be able to play as the box to box midfielder with more attacking duties, a role he understands better and needs less time to learn.