I still like the etheric light idea, but I'm also aware that this is the way MMOs work. But if you would make etheric light really rare it would still work. Imagine that only one per week would be obtainable, or that amount of old gear to wear with a certain limit. Problem with House of Wolves was that it was to easy to obtain, you had your beloved old weapons before you had the chance to check out the new pieces (a lot of them couldn't compare too). But putting a limit to it would still ad a wider variety and keep the player base happy.