These sort of comparisons need to stop. I get what you are trying to say mate but Neville and Fletcher were far superior players to Lingard. Nev was one of the best right backs in europe at one point, will Lingard ever be one of the best in his position? What is his position?
Fletch was a top midfielder at one point before his illness, not world class but very, very good at a time when we had a strong squad. Even O'Shea while playing a different position was for my money a step above Lingard.
Lingard is a decent little player, works hard, doesn't complain (probably) and he's a good squad player. But here's the thing he's a good squad player for a 6th placed Premier League team who plays in the Europa League. If we want to kick on and compete for league titles and champions leagues. Then we are going to need 1st choice and more importantly 2nd choice players a lot better then Jesse Lingard.
I don't think Lingard would even make the bench of any of Fergusons great sides, and thats the level we should be aiming for.