You know it feels like they lost a huge opportunity here. Imagine this scenario.
The Dovahkiin goes back to adventuring after building a manor for his family. In his absence, he fails to learn that the speed and skill with which he built his home has attracted a lot of attention. After selling some loot in town, he is approached by a courier. Once again, the Jarl of Falkreath summons you. The Jarl and a group of merchants and property owners who were until recently residents of Helgen have heard of your abilities. To be blunt, they want the Dovahkiin to rid Helgen of the bandits that have taken up residence in the ruins there and then rebuild Helgen from scratch. You could choose from a number of styles of various costs and complexities. You could have an open and inviting town, or a walled up fort to protect the people from further dragon attacks. You could even put in special structures to attract individuals like yourself that could protect the town in times of need. Perhaps an Arcane tower that works in concert with the College of Winterhold. Or a barracks for new initiates to the Blades or Companions to train and spread their influence. I could even see an underground fighting arena with skylights for the citizens to view the combat. So many possibilities opened up because of this crafting system.
Maybe I'm still bitter about not being able to rebuild Kvatch.