I was hoping Flask of the North is better than Flask of the Frost Wyrm. If that's the case, Alchemist Warlock will be relief from bringing Flask of the Frost Wyrm for raiding in 3.2. Unfortunately, that's not.
However, the good thing is you can use Flask of the North whenever you like as it is NOT consumable. So, still nice buff in Arena, 5-man Heroics, short raid such as Vault of Archavon etc, even just for doing dailies.