I know we aren't getting one for the expansion, but maybe every other expansion would be nice? Not a whole army of them, just one more of each? With guns and gadgets coming around, and all that mechanical stuff, an engineer crafter would be cool. He can make guns, airship parts, maybe some weapons for other classes, and maybe some armor for tanks that looks more mechanical or whatever.

As for land, it'd be nice to see either farmer/shepherd that plays differently from the other disciples of land, or archaeologist that uncovers ruins no finds cool junk like such. Though calling that a discipline of the land is a stretch.