I just named backs considering popular opinion, rightly so, has been pointing out that recently backs coming over from the Old Dart haven't fared as well as forwards have.
Reason why most the backs haven’t faired well in recent years is their size. Its one thing to have speed and agility but small wingers & centers get found out very fast and struggle to keep up. In the ESL development phases if you’re a bigger back they quickly get moved into the forwards.