Changing alchemy mastery

Today I changed my mage alchemy mastery to elixir so I can at least use the herbs in my bank with some proc chance. It's pretty easy to change, just talk to the NPC that gave you the mastery quest and he'll give you an option to unlearn if you pay 150g. To get another specialization I just talked to the NPC that gives the elixir mastery and I learned it. Don't even have to do the quest again.

Potion mastery

Everytime I think about alchemy mastery I regret getting potion mastery. The reason I got it with my mage was because I thought protection potions would still be used for high end content like when I was lvl60 and expected to make a lot of money selling them on AH. But... with the timer on protection potion buff reduced to 2min only non-mana classes are using it. It's even worse with cauldrons now. Nobody pays for a protection potion on AH now. =/ I just pray the price for super health and mana potions to go up a little after the change on Skettis daily quest to give only Unstable pots instead of Super. If it keeps like this I'll change to elixir mastery to sell flasks on AH.