Cast on Crit was unjustly nerfed

Unlike the cast on ignite or freeze to run cast on crit you have to invest in 30+ crit nodes on the tree. You have to have crit on most pieces of gear. There is a huge cost to running this and the spirit cost is 100. How is that fair to nerf it like stuff that requires zero passive points to get the mechanic to work. Pre nerf you needed no ignite nodes or gear affixes to get the cast on ignite so it should have been nerfed. But if you are sacrificing nodes and affixes where you can get more defenses and damage you should be rewarded.