The only thing I can see happening with race/clan locked glamour is people being upset. The lore on the races of FFXIV aren't vast and deep, and most open to interpretation. I'd say the only races we have extensive backgrounds on are the Xaela of the Steppe and the Wildwood of Ishgard (which both have plenty of glamour in game to choose from). What I expect would happen in the fallout would be the hempen underwear debate on steroids on top of people being upset that this racial gear didn't reflect what they have imprinted on these races for years.