Adama was Under Eusebio, in a team that was being relegated and had completely abandoned the Cruyff playing philosophy - they were geared towards results, rather than development even buying older players and shipping youths out on loan. A year earlier, Adama led the Juvenil A team to the UEFA Youth championship so it can't be that he suddenly lost his brain in one season.
Tello, Cuenca & Deulofeu got their first team débuts Under Pep - other coaches disregarded them & hence their development although Isaac's case he simply suffered from repeated injuries more than anything else
In the first place, Lucho never had Adama for 1 month nevermind 2 years. Secondly, both Iniesta & Xavi have talked many times over about how before Pep returned the club to La Masia values they looked outside the club on more than one occasion due to being overlooked, so no on that as well