While it might not look like it on the outset, Vermintide 2 is a game where even the smallest numbers can have a massive impact. It's all about making sure you have enough power to reach certain breakpoints that ensure you kill enemies in one or two less attacks, which multiplied by the hordes upon hordes of enemies quickly turns into a huge advantage for the knowledgeable player. Unfortunately, Vermintide 2 is also a game where getting the currency necessary (Green Dust) to properly optimize your character is needlessly tedious, especially for players that only queue for the hardest difficulty setting.
As such, I am more than happy to announce that the developer Fatshark seems to finally be working on a solution. As briefly teased on the official forums, it would appear that we'll soon be able to downgrade Orange and Blue Dust in order to Blue and Green Dust respectively, thus making the whole system a lot less complicated and a lot less restrictive. All of this is a work in progress, however, so don't be surprised if the system undergoes some major changes before release.
The reason I'm almost certain Fatshark will be tweaking this in the future is because the fix essentially makes different colored dust pointless. Blue and Green Dust are only used together, so by making them interchangeable it's basically like removing a color from the equation and replacing it with a couple of unnecessary clicks. Similarly, every high-level player is quickly going to acquire tons upon tons of Orange Dust, so if it's going to be downgradeable into Blue Dust, why not just remove the extra step and make everything cost different amounts of the same dust. It's a lot simpler, a lot less annoying for the players, and perhaps most importantly, it involves a lot less time spent waiting on the crafting menu!
Whatever the change Fatshark ends up going with, I really do hope they'll release it soon as the Green Dust problem has plaguing Vermintide 2's endgame for long enough.