Osorio does well in the hole because, despite his flaws (finishing and a lack of quickness), he consistently makes the right decision. More than anything that's what you need when you're playing there. Endoh just doesn't have that yet.
I know Babouli is pretty green as well but he's a central player and Endoh isn't doing much of anything, I would like to see what Babouli could do in this role (just make sure you drill into him about getting back behind the ball).