@Jib already addressed the French NT, I'd like to correct this statement. PP never played "as a 10 in front of two 6 behind him" back in his Juve days. Under Conte, he was deployed in 3-5-2 with a regista behind (Pirlo) and aggressive box-to-box midfielder next to him (Vidal, Marchisio). When Allegri took over, he switched to 4-4-2 diamond and again - Pirlo as regista, box-to-box on the right (Marchisio) and a #10 in front (Vidal actually played there). In both of these formations, PP basically played the same role... A left-sided attacking CM with freedom to roam, not really a #10. More of a wide, attacking #8.
The essential thing here is that Paul was never asked to do everything on his own like he's at Manchester United, because Juve had specialist midfielders for playmaking and workrate, leaving PP to do his own thing. And he's done that brilliantly, by far the best player in that Juve team, carrying them to league titles and a CL final despite his young age.
That being said, I absolutely agree with your suggestion. I'd love to see Paul deployed as proper #10 in a 4-2-3-1 with proper double pivot to cover for him. Kante and Ndombele preferably, both are Pogba-proven. Another thing I'd do is to take Rashford's number 10 (the boy has done nothing to deserve it) and give it to PP.