I think there is going to be a maximum limit to the age of the NTC (non-traditional character).
Basically, I cannot see why anyone at the start of the game choosing either of the other options. Unless I have misunderstood joining a player family will not be possible as there will be no player born children to take over, wards are alone, and non-traditional characters get a huge host of bonuses.
No, you can't join a player family but you can join a NPC family. As they have young family NPC members to take over.
I think that choosing to join a family is the middle option. The one that is balanced between customization and resources/skills/etc. Ward is the option that would allow maximum flexibility and cast your character from scratch without anything dragging you at the cost of other benefits. While NTC is in the opposite side, where you have a established set of skills, resources, lands, fame, etc but sacrifice customization and, probably, some of the family benefits as well (though this is not very clear).
I think that all the options are valid at the start, it all depends what you want to do or what do you prioritize: customization, something established, something in between?
Personally, I won't choose a NTC because I would like to have certain flexibility and customization in the character I'm going to play, so more likely it will be family for me, though I won't discard the Ward option yet.