From what a dev said, 1.02 Blizzard should be a 4 second intiial freeze, 2 second unfrozen, 4 second refreeze, 2 second unfrozen, and so on until Blizzard expires. Which, if it actually works that way, is not that far off from the 20 second freeze Blizzard gives pre 1.02.
Problem is, I don't see Blizzard doing any freeze apart from the initial one, making it much worse than intended. I found I'm trying to burst them down while they're in the AoE rather than using Blizzard as another CC spell.
Not that Blizzard is useless; on the contrary, the knockdown and the initial freeze is still useful. It's just that you should be turning it into Storm now, when before, any 2nd AoE would be more than enough to kill majority of trash mobs.
Cone of Cold is perfectly balance now. Before it was 10s freeze and 10s cd, which meant permafreeze. Now its 8s freeze and 15s cd, which is still respectable.
Crushing Prison, on the contrary, has been nerfed and buffed. Its duration has been nerfed, but since it still does the same damage, it actually does more damage per tick.
Force Field is still stupid powerful. Even nerfing it from 30s to 18s doesn't change things.