We need to look at how effective sending players on loan is, it doesn’t appear to be any more effective than keeping them in the U23s, where they’d have the added benefit of being around the club and being available if the first team needs them.
Out of Lingard, McTominay, Rashford and Pereira, 2 never went on loan, Lingard had 4 loans at Championship level and wasn’t ready for our squad until he was 23, and Pereira’s loans don’t seem to have helped him at all.
I’m thinking if a player isn’t suitable for the first team by 20, they aren’t likely to be and they should be sold with either a buy-back, or sent on a long-term 2 year loan.