How much of his drop from stardom was due to his widely reported alcohol and gambling problems?
I don't think it was so much changes in the NRL that caused his dramatic drop from taking the Bulldogs to the 2012 grand final to where he is now.
I would only be speculating if I commented on the alcohol or gambling issues. I think it's a combination of injury, confidence and also been pushed into a position he isn't suited.
He played fullback for the Doggies, but most NRL teams prefer a big tall fullback for the up and under kicks, as we know this is a major means of scoring in the NRL. While he was as the Broncos they moved into the halves where he was average, Cronulla also used him in the halves where he was again average, they tried him at fullback where he didn't fire so they finally found a use for him off the bench as a late game utility player/match winner.
With the new rules in 2016 which limits interchange, there isn't a spot for utility players, the interchange will be mostly reserved for the big forwards. So potentially, Barba who is on a reported $800'000/annum contract could be playing reserve grade.
I actually think Barba would be better suited to union, union isn't as obsessed with having massive wingers and fullbacks, there are plenty of smaller wingers and fullbacks out there.