He needs to ditch 4-2-3-1 as its not working. The midfield is just being bypassed with increased pressure then being put on the defence which they cannot handle. We shouldn't be this open. Better teams such as Liverpool will continue to punish us. We either need to move to a flat 4-3-3 or 3-5-2. It's baffling how lined up so open against Liverpool yesterday.
For the 4-3-3 which is the option I would favour, we need use 3 of Pogba, Matic, McTominay, Fred, VDB and possibly Lingard against weaker teams. The front 3 then should be made out of Bruno, Ronaldo, Rashford, Cavani, Greenwood and Sancho (not really sure Martial features anywhere). When Bruno is playing, it will be as a false 9 and he could possibly play in a 4-2-3-1 if we are playing against a weaker team or chasing a goal. The flat 3 should hopefully give us some stability in midfield which we currently don't have.
For 3-5-2, its a similar mix of the 3 front positions of the names mentioned above however only 2 midfielders will be able to play. To make it more progressive, McTominay could play as one of the CBs as he does for Scotland.
For both systems, we need to work on our fitness and pressing as this is a key element of winning games IMO.
Some brave decisions need to be taken on line ups and people being rotated and left out. I'm not sure whether Ole can make these changes but if he doesn't then we will continue to struggle as we are.