it depends i got a 24 token striker that with that price should have been a fast trainer, well like hell was he won`t be doing that again i`d rather train non token player and sell on first day of season,
on the other side i get 4* player and my squad is almost world class and 90% are 21 and younger so not worth me getting youth as that is a hell of lot green packs to get close to squad rating, BUT if Nordeus gave them a special ability then they might be worth signing and training
edit; i don`t mean give all youth like non token a special ability i mean the most expensive token one`s say the 21 and 24 token youth an ability