Didn't realise this thread was still alive, I'm thinking about making a new one once all the transfers are done. Right now I can't really predict the GK/CB/ST/winger scenario (although Pedro for Di Maria looks fecking obvious) which makes it difficult. The thing is writing a post like that takes me ages since I have trouble explaining it in English, I want to make it quality.
In the OP I said 433 with the point forwards is his preferred formation- we've seen that now. We can call it 4411 or 4231 but van Gaal calls it 433. The reason it's a bit iffy is because of the 10, he plays more as a 2nd striker then as a CAM. I thought Memphis was brought in for the LW, but I can see him as a long term 10 over Mata/Herrera which I thought would be playing there. For now it might just be an experiment which can be dropped after a few bad performances (mainly losing possesion too much in the MF) but I think he has big plans with Memphis. This formations has it's problems (like
@Sam mentioned the 2 forwards can look very disjointed) but I won't go to deep into discussing this yet. It was my birthday yesterday and I'm still hangover
Like I said in the OP the 10 is very important, in an ideal van Gaal scenario he's likely to score and assist more than the striker does. Memphis is clinical, creative and offensive wise he can do everything on top of being built like a tank. Defensively he hasn't done much in his carreer (he usually had freedom) but when he was tasked with defending at the NT or vs big opponents as Ajax/Zenit/AC Milan he defended superbly, it's not his strong point yet mind. I don't think van Gaal will give up on this experiment soon, Memphis is as complete going forward as you'll find at 21 but he can still be Schweinsteigered at his age. It's not looking likely that he will be a bit-part player in his first season, which I can understand. The lad is mature enough for the PL.
@Physiocrat
Yes, the defensive players I mentioned are centrally because the fullbacks are also part of the attacking gameplan.
The fullbacks need to be good at everything basically. He wants tactical fullbacks who can perform his gameplan, not just bomb forward in the hope that they'll receive a pass. They need to defend first and foremost, but also go forward per instruction. I'd say keeping possesion/being good defensively>bombing forward is what he prefers yes.