Two things:
Like everybody else has said, better going forward, and we saw this last season. Ole know it too, but, our build up play from the back may not be as smooth in theory. In reality, i don' t think Pogba has had the effect playing from deep that ole would have hoped for, and in fact his defensive liabilities are hurting mctominay. The improvement in our defence on the ball, with mcguire and wan bissaka coming in, seem to have been more responsible for this than anything pogba has done. Playing Matic there or experimenting with Fred as a dm should be considered, but neither mctominay or pogba should be the dm's for our team.
no. 2, Pogba is not worth all of the fanfare over his departure. He's not that influencial, not nearly as influential to us as people would believe. If a kroos or thiago were playing in his spot in a two man midfield ( where there are only two influencers from deep), the team wouldn't look as poor in possession and aggression through the middle as it sometimes does. He has moments of magic during the game, but unless the game is open, does not really impact our control of games. People would have you believe that losing him would absolutely destroy us as hes irreplaceable. It may, if noone else was signed in his stead, but he can easily be replaced in the market by players who fit the premier league model of what a midfielder should be.
I don't believe he is a premier league midfielder, and as a result, has struggled for consistent form. In less aggressive leagues, Pogba would be a phenom with his skill combined with his physical stature. But in the premier league, where second balls matter, a good midfielder has to have good concentration, anticipation and a high enough work rate to perform defensively. Keane, vieira, gerrard, lampard, scholes, all had these features. Pogba does not.