Kadthar here,
I understand Verant's reasoning for making these pieces only for the classes they did. They seem to have a goal in mind to make class and race combinations that are not played much played more. However, there is an Erudite cultural forge, so it seems that it might have been the ideal place to put good Erudite Cleric, Paladin and Shadowknight armor. Also, I hope that there will be some recipes added for Erudite tailoring for casters. After all, high elf casters are as common as Erudites (if not more so) and they get racial armor (very good, forged armor at that).
Kadthar Al`Kreshid <Midnight Unity>
Level 27 Erudite Gatecaller (Magician)
Tholuxe Paells