Two ideas here, both interrelated. The first is that after crafting a full set at any set crafting location, the player should be able to research from those items in order to learn how to craft the set bonus at any regular crafting location.
Second: Crafters should be able to research the set bonuses from non-craftable sets (the sets that can only be found through loot drops) in order to learn how to create those sets at crafting stations.
PS4 / NA
M'asad - Khajiit Nightblade - Healer
Pakhet - Khajiit Dragonknight - Tank
Raksha - Khajiit Sorcerer - Stamina DPS
Bastet - Khajiit Templar - Healer
Leonin - Khajiit Warden - Tank