Before 2.4:
Every 20 A Rank NM's killed yielded 4 Alexandrite.
Every 375 A Rank NM' kills yielded 75 Alexandrite.
After 2.4:
Every 20 A rank NM's killed yields 3 Alexandrite.
Every 500 A Rank NM's You will have 75 Alexandrite.
25% nerf, 25% more time needed to obtain a Novus Weapon. 200 hours becomes 250 hours. You get the idea. It's simple math. you can hire a 5th grader to solve problems through numbers before the problem even occurs.