Freeze sadly does not shatter enemies :(. Feels bad man. Please add that sweet crisp shatter sound and visual to the freezed mobs like some of the ice mobs. I wanna see tons of frozen body parts melts on the ground.
Also, boss need a nerf in their freeze avoidance or adjust the max hp formula in the freeze formula. Playing freeze multishot marksman with 700% freeze mult and 120%chance frost bite, I can freeze most mob in a hit, even the big ones. But the act 8 second and last boss only got freezed once for 0.5~ sec in my long fight. Make sense that bosses should not be cheesed but, still disappointing that freeze is useless on bosses.
I have not tested the freeze rate on chill stack affix yet since I haven’t seen one drop.