What were the devs thinking when they didn't nerf the FCAR and the SA12 into the ground?

They nerfed the CL-40 harder than they nerfed the FCAR and they didn't even touch the SA12. Wtf is this? Literally every update this patch has been a major W, but they just left the two most broken weapons in the game basically untouched. I'm done with ranked until the FCAR isn't a must-pick. It's just so unbelievably boring.