It's been like that since i started. In 2003. WHMs sucked for healing compared to RDM, now RDMs are basically useless. DRGs were strong then they were sitting forever in Jeuno shouting for parties, PUP was almost always a ridiculed job. SAM was mediocre then uber then useless. DRK was almost always sitting alongside PUP and DRG. THF and BST always had huge problems to join parties, SMN were almost always shunned.

The only jobs i can remember that never suffered from being useless in the game were GEO and SCH.