Dai,
I have to say I disagree with everything you have written!
The analogy of League taking Welsh players doesn't hold water. They were amateurs and simply could not earn a living as a professional sportsman in RU despite the odd brown paper bag and cushy job.
They were not contracted to anyone.
Farrell on the other hand is already a professional player with a contract to honour. He IS well paid.
Trying to say it is the same as RL taking RU players is too easy and wide of the mark IMO.
As to the idea of it showing RL in a good light that is not how it will be presented in the RU biased media. There is more than Stephen Jones who will pen articles saying how this shows RL can't hold onto its best players and is this a second rate sport. It does not matter how well he does.
Ironically if to wanted to RL could hold onto Farrell by simply holding him to his contract but that fact will simply be ignored.
I also can't say I have seen anyone who disagrees with him going call him Judas. I myself think he his is in the wrong over this but that is going too far.
He is currently recognised as the best player in the game and is the GB captain. With that you get a lot of accolades and pludits and as you say things like that are important to players. So when I see him receive all this recognition includng an OBE for services to the game you will have to forgive me if I see the idea of him leaving a mere few months later in a dim light.
He, like all professional sportsmen, would not have had a career without the fans paying money to watch the game. His lifestyle and position in the game are directly related to the support he recieves. Loyalty cuts both ways IMO and this is not just an ordinary job.
Also as GB captain his responibility to the game that goes beyond yelling a the team on the pitch. In many ways Andy Farell is the face of British Rugby League. His picture is all over SL promotional material and it is part of his job to be an ambassador for the game.
So to see him attempt to walk away so soon after receiving all the accolades he can get when he also has this responsibility is not, IMO, something to take with a shrug of the shoulders because he has been a good servant to the club.
I also think you under-estimate how well known he is already nationally. Both RL and RU are not the national game and ask anyone not involved in either sport as a fan to name a player and you would IMO be as likely to get Andy Farrell's name mentioned as Jason Robinson's. If Johnny Wilkinson remains out of the international limelight for much longer the average man in the street will be saying "Johnny who?"
Finally as to new challenges he as unfinshed business against the Australians in League and Wigan are long overdue some SL success so the challenge is still there. If he is single handedly shoring up Wigan then he will be doing much the same in RU given the standard of England RU at the moment. He is not on a banker to emulate Jason Robsinsons success with a World Cup winners medal by any means IMO.
If he goes will I be interested in how he fairs in RU? No, I won't. I am not interested in the game at that level despite the fact I help coach Chester RUFC under 11's. (Under 11's is better than the real thing - there are only 12 players on the pitch

)
Dave