I would think it prudent to sit on this one until the facts come out.
Potential scenario:
TAF is all good and well for NF on dep. from Samoa
At PNR, crew gets updated WX and TAF still good.
Crew press beyond PNR as fuel is all good at this point.
Wx closes in when aircraft past PNR.
Aircraft cannot make it to any other divert (not aware of RPT NF rules, so assuming they legally don't need to hold Tontouta based on good TAF for NF on dep. Samoa?)
Crew has no option but to land at (or next to) NF.