I could easily see him replacing Kolarov as the leftback who can cross the ball but is a liability defensively. We could easily have him as our second LB if we had a reliable, out and out first choice LB ahead of him. The thing is, unlike Kolarov, Angelino will get better defensively, he also still has a lot of physical developing to do as he's still incredibly young. Even as he is at the moment I'd probably rather have him than Kolarov, as I think his attacking game is more varied and I'd probably find his defensive problems a lot more forgiveable than Kolarov just not trying.
He's not a good defender, but he's probably still way ahead of the curve for a fullback, as most players who end up becoming attacking fullbacks are still wingers at his age. He looks like a hard worker and he's not an idiot, so you'd expect him to get a lot better defensively as he gets used to first team football. I think he'd also benefit a lot from playing in a better side, as a side that gives it away as badly as NYC isn't a great place for a wingback.