Devante Cole would have played for Utd. Irrespective of whether he is going to make it at that level or not, he would have been given game time by now, if he played for Utd, or Arsenal, or Everton, or Spurs etc etc. But not at Chelsea.
I don't think that's true. Ravel Morrison was supposed to be their most talented Youth player ever and he never managed a game in the 4 years he was there.