There are times when his propensity to lose the ball unnecessarily exposes us. And he should learn from it, just like any player should. Thinking in particular when he's playing out on the right with Greenwood and AWB overlaps - he's been guilty a few times of sloppily losing it at that point trying something - which leaves the whole right flank completely open. Just little situations like that, he could recycle posession instead of trying the unnecessary.
But his overall contributions are world class, and who knows where we'd be without him. Really, we should have binned off Pogba, stuck with youth, energy and movement up front and brought in a more technical, less risky player to replace Pogba and join Bruno in a three. Like a DVB type. Then let the pace of Rashford, Martial and Greenwood provide the energy and incisive runs.
Instead we kept Pogba and got Ronnie. Said it other threads, you cannot play those 3 at the same time and win a lot football matches. All three of them lose the ball too much, and offer too little defensively. You want one player like that, you can cope with two, you lose with three.