This is usually how we end up when facing low blocks and/or organized defenses.
Bruno centrally just outside the 18 yard line, with Martial lurking just on the 18 yards line, whether it's from the center, from the left or from the right.
Rashford is on the left, with the left back coming in either outside or slightly deeper inside to help recycle the ball or create an overlap.
The same with Mason and Aaron on the right.
Pogba plays slightly deeper than Bruno, and is usually more open because of this. Helps keep possession, recycles the ball well, and when getting the ball has plenty of options with Bruno usually facing him to set up one-twos with either him or Martial. Martial usually starts running in behind/through their central defense from either side or center, Mason cutting inside or towards the goal line, and Rashford the same.
There's always a plethora of options, but given the very tight space to navigate for all players, the margins are very slim. You can see us trying to go through their defense using all players involved multiple times per game, and it works quite well I reckon. With more experience and a better squad, we're going to score for fun in many games this coming season.
Matic is positioned centrally, between the 18 yard box and the midfield. He's available for passing, pressing, and is key to this whole system working the way it does. His cool head and him not being tempted to push even further up or get out of position gives us defensive solidity, and he's also a decent passer. We do need someone with quicker feet and probably a better shot as well, though. Tonali is mentioned, as is Koopmeiners.
The system is there, clearly. This has worked out well for us time and time again since Brunos arrival. Even against Sevilla and København. We created plenty, but were let down by poor finishing and/or godlike goalkeeping.
The system is also set up for the right players to come in and do a job, and has severely exposed which players aren't good enough.
Grealish would work very well on both the left and centrally in this, and nevermind Sancho. He would love playing like this, it really suits his style of play, and he could do a job basically anywhere on offense in this setup. Andreas and Jesse? Not so much. They don't have time on the ball and have to be quick on their feet, quick in their heads, and be very precise with their passing. Not suited, not good enough, simple as.
Mata works to some extent due to his intelligence and passing ability (as seen against FCK), but he simply is't quick enough to do a good enough job against almost any decent side anymore, sadly.