Other than a short cameo for Obafemi he hasn't used anyone puel hasn't and Puel used a lot of youth in the cups due to his rotation policy.I don’t know. I do not think Pellegrino has been that bad in this specific area. I think he has been better than Puel or Koeman, actually.
Tough to compare though. You can look at it like Pellegrino has no cushion therefore it is harder to bleed in the youth. Or you can look at it like the team stinks so that should make it easier to swap in someone new.
Puel obviously had a bit more freedom to use them but Pellegrino really should work out some way to include Hesketh who is in cracking form though.