I would like to see items no longer available to be purchaseable through Eververse or through Bungie's website.
For instance, I would like to make an Anubis character to look like the guard from Stargate (complete with glaive and ship :), but I don't have the Osiris helm for it because I wasn't playing back then. To keep with bungie's achievements-based reward system, if I accomplished what was required to earn that helm in a subsequent Trials of Osiris event, I want to be able to either win the helm or purchase either the helm or the ornament from Eververse. I thiink that would be a win-win, as Bungie can profit from my desires, and I would still need to put in the effort required for the reward without ruining the exclusivity of it making those that earned it before left feeling gyped.