Shit players didn't know how to play their jobs before and after level sync. No one stayed in low level areas in xi parties once they hit 55+ and could party in toau.

No one ever partied in Xarca/Glacier/Bibiki/KRT after toau, which was long before level sync was added, and rightly so. Exp in those zones were terrible.

The only thing level sync does is create more opportunities for exp parties to occur, and level up faster.