First off, personal housing will be instanced. The neighborhood will have to be instanced. There is noting to suggest that they are not --sure, but if they are not, they have got to be the dumbest developers in the galaxy. Also, you can craft in ANY instanced area in the game. They actually written in deliberately that you cannot craft inside your residence. For what official reason? We don't know.
I am on the fence about it. I'd love to be able to craft inside my residence, but then again I see the points in not allowing it at the moment.
Anyway, there is no reason on the technical side why it's being blocked.
