I like 10 as a nice round number, and people have been requesting them! Ten callings and twenty crafts was always my end goal. That being said, I think the essential ones are all represented, so I don't have strong preferences about what these other two will be. I personally have about a dozen callings left on the drawing board, and community members have made a lot of good suggestions, too. So it's not clear yet what the other two will be, if I decide to add them!