Ever since the idea came to me a while back, I've really been into the idea of Nettie being a potential companion for us. I love a dwarf gal, they're sorely underrepresented in media. I think she'd be a better companion than Halsin because Halsin just feels too... important. Having him in the party as a full on companion, it could further strain the justification for our character being the leader of the party. Nettie is still an apprentice, she's got a great voice and I think she'd be an interesting good companion in her own right.
In general, I think nine or ten companions would be a good number to aim for. Both the Dragon Age and Mass Effect franchises have consistently had about that amount, and they're far more limited in terms of classes. I do think that they're going to need a few more though. As has been pointed out, it's quite likely that if you go the cult route you'll end up with a dirth of spellcasters. These are supposedly the most evil companions, and while they're not that evil overall, I do think that they're all at least morally compromised, with maybe the exception of Wyll depending on your perspective. So I think including more morally uncomplicated companions is very important, I don't think there's room for more evil-leaning companions unless the roster of good companions is expanded significantly as well.
