Some interesting line-ups.
But 1 question: this year (across the full season), our best players have been De Gea, Young, Fellaini and Blind. (I havent included Carrick because he did not play enough games).
In all likelihood these are the players, who if fit, will start for us next year - just as they have this year.
Why have most of you omitted these players?
De Gea doesn't belong there. He's likely going to Madrid. Nobody wants him to.
The rest, with the possible exception of Blind, just aren't good enough. There's no upside there.
Young isn't a scoring threat, and you need that from a winger in a 4-5-1/4-3-3 unless they're creatively elite. He had 1 goal and 5 assists in 17 games out left (according to Whoscored). Double that for a full season and you have 2 goals and 10 assists. That's not a horrific season for a winger at all, but it's not good enough for us in our formation.
Fellaini isn't a very good passer and he's a bit clueless defensively. Hopefully he can contribute as a depth player backing up Herrera and a new CM or Di Maria or Mata playing centrally.
We struggled away against mediocre teams this year. I'd like to see us have 2 teams next year, one for blowing teams away and one for matching up with them. This assume Memphis is ready to start right away. If he isn't, Di Maria would start out left in team 2:
Team 1 - Attacking
------Rooney-------
Memphis-----------
-------Mata-DiMaria
---
CM---Herrera---
Shaw------------
RB
----LCB---Smalling
Team 2 - Solid 2-Way Team
-------Rooney-------
Memphis---Mata/DiMaria
---
CM---Herrera---
----Carrick/Blind
Shaw------------
RB
----
LCB---Smalling
2 big signings like Otamendi/Hummels and Schweinsteiger/Vidal/Gundogan and then a cheaper RB signing like Alves on a free or Darmian should make that possible.
Save some cash and be ready to go after a top of the market superstar to finish building the squad, like Bale, Ronaldo, Koke, Verrati, Pogba, whoever else emerges as a star or maybe a former Van Gaal player looking to come to England like Muller or Robben.
We may not be able to attract that player until next summer and only if we make a solid run in the CL and make a proper title challenge.