I have observed and analyzed the big behind a successful team is a top hard working dcm. He is running alot, good to break up opponent attack and is decent with the ball. Like Kante and Fernandinho.
So if United dont get this kind of quality player in this position. Im sure United will not get into top 4, even after buying Maguire. With this current squad. United biggest problem is the dcm, not cb. United cm is the weakest link. If McTom, Fred, Matic, Perreira, or Fosu can improve and hit the level of Kante and Fernandinho. It will help a bit.
My advice and suggest to United. Find a top dcm and better spend big, 70-80 mill £ on him and around 50 on a new CB. Because injury free season or not crisis situation. Always have 3 cb options include Tuanzebe. Im satisfying with United CB options with Smalling, Lindelof, Bailly, Jones and Tuanzebe. Even Matic can be a left cb back up option.
So again. I can conclude if United dont get a top quality dcm/cm this summer or current cm options can hit top level over a whole season. Even a Maguire, De Ligt and Koubaly will not help much for that top 4 spot.
You can be as good as you can with a solid backline. But without a top quality dcm to shield, protect and do the hard work in front of them. And to win the battle in the middle of the park and pitch. Most time you will not win the matches and will end out of top 4. Compare to the others top 6 club level.
Liverpool and City will finish above United. Tottenham might do it too. Then you have Chelsea. Transfer ban, but Lampard is taking over a really strong XI line up and squad.
Az - Rudiger/Christensen - Luiz/Zouma - Alonso/Emerson
Pedro/Hudson - Kante/Kovacic - Jorginho/Barkley - Pulisic/Willian
Loftus/Abraham - Giroud
In a 442 formation. Chelsea are closing two really good options in every position.
And theirs U19 came to the final of the uefa youth league final 2019. And i saw they some good youngster as United 19 like Chong and Garner.
So it will not surprise me if Chelsea get 3 place again next season. If Lampard get the best out of those players together. Their chance to get top 4 is high. Special if Hudson and Abraham play for them a lot next season. Lampard is taking over a really good squad.
Contra and compare to United midfield
Mata/Lingard/Chong - Matic/McTom/Fred - Pogba/Longstaff - Martial/James/Sanchez
Who are United hard working cm with running legs?The cm player closest to those needed abilities is McTom. McTom is lightweight. So he might can run alot. Fosu Mensah might has the legs and athletic abilities too. No Herrera legs and hard working. And go into the next season with United current cm options. I can smell problems long way. United weakest link and area. Get to be solve before the season start.