With young players, it's about giving chance at the right time, and completely backing them until the end. End meaning, their success by ending the transition to senior team or your end as a manager. If you keep putting them in and taking them off without proper backing, their confidence gets shot to pieces.
I remember when the likes of Pique, Busquets and Pedro started playing in Barca 1st team. They looked pretty bad, especially Busquets (who was playing in the place of Yaya Toure no less) and Pique, who looked like accidents waiting to happen. But they played 10 full games, and looked like much better in 10 game span. But I thought it is not working first 2-3 games.
With regards to Pacheco, Sterling, Suso etc., Rodgers will need to give them chance. A proper chance, not a 10 minute cameo at the end of a dead match. And give them some continuity. I am afraid Pacheco has stopped in his development for the past 1-2 years already, and if not given a proper chance, he is going to be next Fran Merida rather than anything else.