Crowd Control is intended as a mechanic against, as the name suggests, Crowds. The particular amulet made it possible to chain cc bosses. After 1.0.0.9, it is possible to briefly freeze them, which is still a very powerful tool for interrupting abilities.
The build you seem insistent is dead because of this is likely even stronger with this update than it was before due to other changes, but it can no longer completely trivialize bosses.