I would keep Angelino. In a few years he could turn out to be a brilliant full back. He certainly has the ability going forward - it's just about the basics of defending. He's definitely young enough to learn.
Trent is not the best full back but because Van Dijk is next to him you rarely see his weaknesses.
Trent is not the best full back but because Van Dijk is next to him you rarely see his weaknesses.