Righto, the big part is finding a male to rule beside the Queen. Can't make a baby without the gravy. I just would stress that Daenerys would put forth a precedent, at least in my mind understanding her character from both the books and the show, that a female has just as much right/ability to inherit the family/house/etc as any other. But at the end of the day, it is Blue's call, and I defer to him. The lore is just a big ol tangle of fun excitement, and we have to extrapolate what has happened since Book Five, and go from there.