The portraits at the very least need to be made moddable, but I've been asking if you could get a way to define how many families they have ever since it was mentioned in a DD for TR that "unhardcoding" it would be very easy, and nothing has happened. I think Paradox has just accepted that the Merchant Republics will always be an unmoddable mess that breaks with the design goals of CK2, and hope that we will also eventually accept that this particular fuckup will never be fixed.