Alot is being said about Pogba, Jesse and Rashy if they played under SAF. Here's my 2c
Pogba was one of SAF's rare mistakes ie he should have never mentioned him as a reason behind not investing in CM. As per usual SAF was defending the club but by doing so he placed a very ambitious and a very inpatient player under the spot light. That was a mistake.
Pogba didn't play with United for two reasons. First of all he wasn't yet ready. Sure he had all the technical and physical attributes to succeed but he lacked the maturity needed to make all of that work together effectively. Secondly its because SAF's last team couldn't sustain it. Carrick was growing old, Scholes was ancient and they needed grit rather then a fancy AM. Juventus were in a better position to cover for the latter (prime Vidal and a magnificent Pirlo) and they couldn't be arsed about the former. The end result is the mess we see at present ie a 31 year old player with the football maturity of a 17 year old. FFS the likes of Giggs, Maldini and Baresi had ten times the football maturity at age 17 then Pogba has at 31.
Regarding Lingard and Rashy I am 100% sure that they would have featured in SAF's team. They were both young, eager, talented and could play in multiple roles. That's a no brainer for SAF who always boosted the squad with academy players so he could spend the dosh on top talent. I dare to say that under SAF's guidance at least 1 if not both would have ended WC players. SAF wouldn't have pushed them ahead of their time as a desperate LVG did with Rashy and he would have made sure to keep them as far away from the spot light as humanely possible. The two would also have had the time to develop their skills and Rashford would be a far better player then this inside forward whose over reliant on pace. Things are different with the likes of Sancho though. Hell would freeze before SAF would buy him up
SAF's retirement costed us a second SAF's babes with Lingard (squad player but Oshea style), Rashy (first teamer), Greenwood (first teamer), McTominay (he who would be further developed and he'd be squad/first teamer level), Welbeck (squad player), Januzaj (who we foolishly saddled him with Ryan Giggs former shirt btw - he'd be squad/first teamer) and Garnacho bursting into scene to either be first teamers or solid squad players. Unfortunately the Glazers left an accountant on top. It would take us years before we realized that actually we need someone to have someone to help kids deal with the pressure when moving at top level football and we haven't fully implemented a structured system in where progression is carefully monitored, kids go into first team when they are ready and those who do not make the mark are sold for actual money.