I'm pretty sure bungie said they made a mistake with etheric light and they would not do anything like that again. That does cut out a lot of content and cause a lack of variety in the gear we use, but they want us playing new content with new gear. That said, I think they should have an armor smith and the weapon and armor smith could infuse gear that have that slot up to the maximum light one point at a time. Part of the cost could be ascendant materials, radiant materials, and etheric light.