I think his comments were reasonable, he hasn't taken a swipe at the club, just said he was frustrated with lack of opportunities.
The big takeaway I have from all this is - when players do these code changes, especially late in a career, it generally doesn't work out. There are a few cases of elite outside backs like Robinson, Sonny Bill, Folau, Sailor, who have been able to succeed in both. These are just guys who in either sport, are generational talents who stand well above their peers as athletes. Sam Burgess fit that category too but wasn't an outside back.
Most other players seem to code swap for financial reasons then a couple of years later they come back with their tail between their legs looking for options and their careers and reputations are rarely the same second time around.
If one of our players started saying they had big money options in union and tried to leverage up contract negotiations I'd let them go and then sign them on a discount when they wanted to come back in 2 years.