My idea would be a system where we can use Glimmer/mats/marks and rep. For example:lets say I wanted a certain shader I would go to Eva and she would have a list of all the shaders in the game. But to get the one I wanted I would have to hand her lets say 250000 glimmer, you don't give it her all at once because of course you can't. But you can hand her as much glimmer as you can afford to give her and she keeps adding that to the total till you have the 250000 you need for that shader. Now that's just one example but lets say you wanted one that's more sort after and harder to receive in the game by drops/chests or raids. to buy that one you may need to hand over glimmer/Mats/ and marks to receive it. This idea also gives us something to spend our glimmer on as well as marks and rep we no longer need. And we can still have the shaders dropping in game as normal too. Its something to think about.