The Fiji Airways lounge at Nadi is a PP lounge.
This gives you 3 extra things:
1. A/C - the main terminal is not air-conditioned
2. Shower if passing through to NZ or Australia (although not the best shower, at 5am after a 10 hour flight from LAX, anything helps)
3. Somewhere out of the current construction zone
Fiji Airways flights can arrive and depart at annoying times, so having somewhere to sit during these times can be a good thing.
Once the airport construction is done though, the place might be a bit nicer, but they did construction 10 years ago that didn't really help much, so who knows!