I have 2,270 diamantine and only 270 Plasteel. I play a lot of Heresy and Damnation but get too much diamantine spawns. I think an easy fix for this would be an option to salvage diamantine and turn it into plasteel. If that wouldn’t make sense realistically then make plasteel more common. I have 240 hours on Darktide and this grind for plasteel feels off when diamantine is supposed to be the rare resource.
Edit:
Another way to fix it is increase the amount of plasteel recieved on pickup on higher difficulties.
I have no idea why they made it so that the rare crafting resource becomes more common on harder difficulties. Basically forces high-skill players to play with lower skill players (and potentially screw over their games with their habits) in order to get crafting material.
Should be equal across all difficulties, or let us dismantle weapons into crafting components. Could be a strategy to buy whites/greens from the store and turn it into plasteel to supplement you.