If he goes somewhere else and becomes great then props to him, but I generally only wait to have that discussion until after the player has actually left. Prior to leaving the club it should be every B team players aspiration to play for the first team, because if it's not, why the hell are they there?
You've already made your biased judgement on him, that he will never make it to the first team, I don't understand how you came to that conclusion. I'll keep saying that though Munir is great he has not done anything that Dongou has not done before. Lucho came in and preferred Sandro and Munir which is good for them, just like Tata preferred Dongou last year.