He was signed as a developmental player who is obviously very talented. You don't sign players drag them across the planet for them not to be.
But the key word again by FL is attitude, he has the tools to be a good pro, but does his attitude allow him to have the desire to make it in our game. His path will be a good one if he ducks his nut and opens his ears. Because he has pace, skill is there, he just needs more game minutes to build up his strength.
Patience is needed by the fans, because his style and age will bring inconsistent performances. But within the squad someone he respects has told him to do well in the game his talent is not enough, its attitude that will make the difference. I hope he keeps taking these steps and keeps getting opportunities to show it. He will stay in 1st team squads ahead of certain others and will get better.