No worries about him losing the run of himself and heres why;
We don't have to play him.
He's a bit part player. We'll give him a little bit of playing time here and there, and some of the top stars in world football, and most balanced personalities in the game are around him. He'll know his place and learn how to conduct himself around the team.
Contrast this to Janujaz, who has had the hopes and dreams of rags from Salford to Singapore put on his shoulders. He'll play 90% of their games and be expected to be the x-factor. Even if he has the talent to pull it off, he'll know its him and not the team doing it. See Joey Barton or Rooney for examples of how these types of players turn out.
This kid seems grounded, and I reckon we wont see him at Wembley as there are more important members in the squad deserving of the appearance right now. This could be a big lesson for Rony, and how he accepts that will say a lot about the kid.
I fully expect him to visit Wembley a dozen times by the time he is done playing for us.