With the actual 7.0 release date literally next week, I'm necro-ing this. Maybe we could get more in a patch update? But especially with two dye channels and other increases to the number of options players have for glamour, and with the number of combat jobs fully passing the current number of plates (and that's ignoring DOH and DOL entirely!), an increase to the number of glam plates is sorely needed.
Hopefully we get it in a patch, and hopefully it's SOON.