Did you see the press conference, and other interviews he did where he said he wanted to play fullback? It's possible he wants to play that position because he wants to play that position, not because of the money.
Regardless, he will not be happy. Hopefully, he'll only be disappointed, rather than ropeable. But I think he'll be a bit pissed off at the least. How that will manifest itself is anyone's guess. Herbie is pretty professional. I think he'll do his job, but he could very well leave.
He said all the right things here, but they always do:
Herbie Farnworth talks about his motivations behind signing with the Broncos for another year.
www.nrl.com
Maybe Kotoni was unhappy at the start of the season because he never got the shot at 6 he was promised. He certainly played it down, but how he really felt about it we don't know.