I can understand low level gear having some model overlap
But don't you think that past i90 for Allagan and Tome sets that they could at least expend some effort to make everything have a unique model? I don't think that's too much to ask considering it's end game gear.
At least for the Allagan gear there's -some- justification considering it prevents unnecessary expansion of the loot table to accommodate all jobs (For instance if you make Summoner/Black Mage Allagan into two different sets then that makes it that much harder for that job to get their drop), but there's no reason things like the Bard/Dragoon sets in CT or the Caster/Healer (or Dragoon/Monk/Bard) sets in First Coil should all have the exact same models.