First I'd like the Great Old One Warlock to be finished or revised, since what we have now feels more like a cookie-cutter default warlock. The Fiend pact Warlock has extra dialogue in the game too and might have extra options in Astarions and Wylls personal quests, so the half-finished feel of the GOOlock stands out all the more.

After that, Barbarian. And Half-orc. Also Gnome.

Then Sorcerer.