Old armor sets that have been taken out of reward pools should be sold by Ada with the upcoming changes to standard mods being unlocked, it'd keep her relevant as a vendor and coincide with her transmog bounties, even if the armors are unable to be brought up in power we should still have a way for obtaining out of rotation armor sets for people who missed some pieces like for me I'd love to finish the iron fellowship set but there is currently no way to obtain it