When Adama with statistic of dribbling he is the best in europe he does not made segunda look like an amateur league ?  It's obvious he will be more easy for  adama to play an highest level , watch  his game against Elche to give you an idea of his contribution ...
		
		
	 
He is good in dribbling and bad in 4 other key things.
He is young, he can improve, some players develop later... Those are all correct answers.
But currently, there are 90% of chances that he will be a weaker player than Tello, than that he will be a Barca's 1st team player.
It is extremely hard to be an attacker in Barca.
So, not succeeding here doesn't mean that you are a bad player.
And usually you have to be really special in a lot of areas to succeed in Barca.
Chances for Adama are extremely small. He would need to improve drastically in a loooot of areas in the next 2-3-4 years, which is highly unlikely, considering the usual way how players develop (and considering their current skills at the age of 18-19-20).