The more I think of it, I believe Neves would be perfect for us, because regardless of whether Pogba stays or goes, we need a player as a DM who could pick up the ball from the defenders and spread it forward long or short, which would be a big weapon for us, imagine long balls behind the back four to Rashford or Sancho for them to run onto.
He like pinging balls straight to wingers for them to run at LB or RB (like Scholes used to for Valencia and Nani). Currently we have this poor sequence of Fred and Mctominay passing among themselves and eventually after back and forth passes (between defenders and CMs), the ball goes to our forward players with the other team setup to defend, but we never seem to play quick diagonal passes from DM position because Fred and Mctominay does not have the ability to spread the play from that position.
Plus he is very press resistant, which is again extremely ideal for a DM because he hardly has protection, losing the ball from DM position leads to clear cut chances and conceding of goals like the one against Liverpool where Fred had a nightmare. He is far better than Fred and Mctominay when it comes to keeping possession when pressed.
Lastly we can use him alongside Fred/Mctominay for them to press high up the pitch and him to make interceptions like Carrick and be the focal point for starting attacks. This is a solid midfield and could be used against top 6 sides, whereas against other 16 teams we can use him alongside Pogba/VDB/Mctominay (depending on opposition)
I have also seen Camavinga, as he is currently the favorite here, but I think he is more suited as a Box to Box midfielder for his skill set, he does not have long passing ability, he is also press resistant, but he also takes people on and dribbles alot to get away from opposition, which is fine as Box to Box midfielder, however a tad risky as DM.
Ideally we sign both and use Neves as DM and Camavinga as CM alongside him, however, due to budget restrictions, I believe we would be able to sign one and that should be Neves, because not only he ticks all the boxes, he will also be suitable for our current style of counter attacking and can start attacks from deeper position against lower league teams setup to defend.