The variation in how long it takes for a CC to be recognised as being applied and how long it takes to break CCs seems to vary so drastically, depending on which one is used, for example breaking a knockback, a fear, fossilise or vamp drain CCs seems to take what appears twice as long to be registered as occuring and feel as though are half as reliable to break when compared to Other CCs. For the sake of the game CCs should either be overhauled in order to make them equal in consistency or standardised to make buggy CCs not overperform as well.
Perfect examples is a skill like silver leashes performance and breaking reliability pre and post patch