Indeed, the Wootz set in FFXIV is actually FFXI's Koenig's armour under a different name (and it's dyeable!). I use the Wootz cuirass (dyed metallic silver) as my PLD glamour as it was my favourite armour in FFXI:
One FFXI set that I would love to see in FFXIV though is the Novennial outfit from one of the earlier FFXI 'Adventurer Appreciation' events - the women's bodice especially would go beautifully with the Spring Skirt! (For some reason skirts mostly didn't exist in FFXI -_-):
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