Well based on the history of ESL backs in the NRL, which is terrible, the kid would have to be pretty special to be worth much of a punt.
Tell you what, if we recruit an ESL fullback who scores 13 tries, makes 13 try-assists, 18 line-break assists, and 4th in the comp for tackle busts, I'll be ok with that. That was Tomkins in his first year at the Warriors.
If we manage to recruit another Dally M winger of the year in his debut NRL season like Brian Carney, I'll be fine with that too.
This is not something I feel particularly passionate about, but how many failed backs are there from ESL really who were actually good in the first place? Joe Burgess is debatable, Jordan Tansey was not a starter in ESL. I don't think that ex Parra half/fullback was anyone special. Greg Eden was a joke in ESL.
No doubt as a blanket rule NRL backs are better, but I wouldn't throw the baby out with the bathwater when it comes to English backs.