SE adds new low level recipes all the time. The biggest batch, of course, came with the addition of housing. In addition to an entirely new category of housing items, things like nails, mortar, and such were added to the existing Crafting Log. Since then, new low and high level recipes have been added pretty steadily, at the rate of generally a few per update.

Would the addition of Archeologist (or any new gathering class) require the addition of a lot of new recipes to be worthwhile? Sure. It certainly wouldn't be the first time SE's added a bunch of new recipes at once, though, so it wouldn't be out of the question.