The problem with the grandparent rule is not the rule itself, but the players.
We are unfortunately caught in a cycle where players don't want to play for countries such as Samoa, fiji, Lebanon & the Four Nations because:
1) They play about twice a year
2) They play on the other side of the world to the NRL
3)) They play during the middle of the NRl/ESL season.
Say what you will about the clubs, the players have to compete in these comps otherwise there is no such thing as rugby league.
So when the three points above collide the international board says "well bugger that, no ones playing, we wont devlop it." Internationals are left to people or small organisations to arrange between themselves and it is only through the shear passion of these people that any international league occurs.
Unfortunately for all our ideas on here we are preaching to the converted. Everyone on this forum wants a world cup every four years, a tri nations, lions tours, tours to Russia, USA, Jamaica, Holland and Upper UZbekasthan but its just not going to happen.
We here know more about the international game and its goings on than any member of the major boards behind national and international rugby league. Its a sad fact, but true. Do you really think the IRLF guys know that Georgia played Serbia the other week??? I dont...