I really as Unseen, you rarely have members that remain in their converted form, so they see little play. On the other hand, the Cult is much more likely to keep converted classes, since there is only one inherited position, and no Mastermind.
So it seems really counter intuitive why unseen has more classes than cult. I feel like they could really shine if they could be played in the faction more suited for them. So why not give Unseen the classes that get converted based on type, while giving the Cult the more specialized classes?