I feel 2 things in response to the new ice spells.
1 cooldown is relatively weak compared to the other spells (especially to mass triage in my opinion)
2 The ice spells are getting the amount of creativity that the others are, niether of the speels are that creative. For example detonate, backdraft, manaburn and supernova took a lot of thought. I don't think cooldown and snowdrift did.
Oh, I saw snowdrift from a wand that came with the Hydra card pack.
I feel the same as I do with the push spell from Myth. Myth got a new spell that allows you to push DoT's to enemies, but you have to use 4 pips, and at most get only one single effect pushed onto an enemy that would most likely resist the damage to begin with.
With Snowdrift, you get a healing dot, but I honestly don't remember any major bosses or mobs in the game that cast DoT's on themselves to begin with. And you'd have to be psychic if you to wanted more than one Life DoT on you.