Personally I hope I live long enough (unlikely) to see Tonga and Samoa both go completely defunct due to a lack of qualified players. The idea that they add anything to the international game at all is a complete joke.
The benefits of what these two sides are doing right now will be felt for generations to come on the islands. There is no possibility of this in any other sport. The impact that Luai, To'o, Chrichton, RTS, Taumololo, Andrew Fifita and co will influence the next generation of kids on the islands to choose Rugby League and make it the national sport in both countries.
The rules under which the current Samoan and Tongan players qualify for their nations are no different to Soccer or Union
1. Birth
2. Residency
3. Heritage (parent or grandparent)
On number 3, check out the Morrocan soccer team that finished in the top 4 of the last world cup. Or the Japanese Union team.
The only way RL differs is we allow the players of tier 2 nations to switch nations without penalty. And we've allowed it to kickstart new nations into the international game. With Samoa and Tonga now seemingly having instilled their own culture and passion for the jersey maybe they can now have this stipulation removed. But decoupling Origin eligibility from Australian eligibility for those born, raised and developed in NSW and QLD.