Afaik feint does not reduce the damage on ice nova. Only will it do so in the case that the rogue is not a direct target of the ice nova, but the direct target of it is near him. It deals direct damage not counted as AoE which is the high numbers you see, and a second portion, as AoE if nearby targets. Feint only reduces the second.
No, it double dips. Icenovas that crit for around 60k with crit for around 17k. If I ice nova into a rogue with feint up it will hit for 7k and crit for 14k most of the time.
I think mawky is right in saying a lot of classes rely on a lot of small hits, making flameglow extra retarded, but against bm/feral or bm/ret, flameglow does very little during their burst. Flameglow paired with druid hots is really strong. We will see if they are as tanky without druid healers. Druids also provide a lot of extra cc to help the mage keep dps off of them.
Mages have traditionally relied on living through keeping control on the dps, so maybe the passive reduction is too much atm, but most comps still rely on the mage polying the dps to avoid taking damage. I know if a tsg both connect on a mage, and have some uptime, the healer, even a druid, would have trouble keeping them up. I think flameglow could use a small nerf to maybe 20% and ice barrier could use a buff.
Someone mentioned increasing the cd of coldsnap. That is a good idea. Mages shouldn't be able to block 3 times in 5 minutes. I think block is up too much atm. A five minute cooldown on coldsnap would be okay. It might even open up other talents in that tier.
Oh, also, I don't think mages are too tanky because of their mobility. Blazing speed however should be replaced by by another nova off the nova dr. Maybe a 4 second root or something. Blazing speed is just too forgiving interms of the mages positioning. Mages should have to be aware of where they are, and blazing speed just kind of allows them to get to a pillar out of LoS whenever they want. Having another nova instead of blazing would just allow them another way to briefly get melee off them. I think melee atm have more uptime on mages than they have had before.