Patch 10.1.7 is adding something achievement hunters have been asking since achievements became account-wide with Mists of Pandaria: Individual achievements for each primary profession. With this change, each primary profession now has an individual achievement category in the achievements pane: On top of the new categories and individual achievements for each, Blizzard has also added new achievements for raising all professions to their max for the missing expansions. These achievements started only when achievements became account-wide with Mists of Pandaria, so every prior expansion did not have such achievement.
Classic Master of All Outland Master of All Northrend Master of All Cataclysmic Master of AllPlus, the missing achievements individual achievements for maxing out your two professions in Classic and TBC. Those were never added because achievements only became a thing in Wrath of the Lich King.
Working from the Start Working in HellfireBelow you can find the detailed list of achievements being added for each profession. Note that some achievements are retroactive, like Silas' Sphere of Transmutation or Portal to Everywhere, but most of them you can only earn progress towards once the patch goes live.
NEW Craft potions 100 times with the Alchemy profession. NEW Craft potions 1000 times with the Alchemy profession. NEW Craft potions 5000 times with the Alchemy profession. NEW Craft potions 15000 times with the Alchemy profession. NEW Know each of the following recipes after learning to create a Draconic Phial Cauldron. NEW Perform alchemical research or experimentation 250 times. NEW Craft elixirs, flasks, or phials 50 times with the Alchemy profession. NEW Craft elixirs, flasks, or phials 500 times with Read more on wowhead.com