I am not sure if this is a bug, but ice form does not provide frigid empowerment.
Also, why does it only last 17 seconds? Seems highly under-tuned, especially because it can be dispelled. 33 seconds or what ever it was when Icy veins gave +3seconds felt perfect. Why did you nerf it by 10+ seconds? Now, you will be lucky to frostbolt+flurry with it 2-3 times during its duration in Arena, as you will be required to resheep your healer after the first 2-3 frostbolts, by the time you cast the second poly, you can only get off 1 more frostbolt+flurry. Then you have to third poly. Making the max number of frost bolts you will be using with this 4-5 and very underpowered. You will be lucky to get any frostbolts off with max slick ice stacks in a pvp situations. Please balance.