At the start of the game if you got a rich mission you would always get some of the purple mats. now I rarely get purple mats on the rich missions and it has seemed to have gotten worse as time as gone by. Has anyone else noticed this or is my lucky just getting worse and worse.
You were lucky early and now the statistics are balancing out. While you may have a higher percentage chance at artifact (purple) quality materials the "better" the mission, there was never a guarantee that Rich missions would generate purple mats.