Nice work!
3D is better, but it needs to be learned and you need to have a better intellect in the sense that you need to know how a building is really build and that you can represent the things in your head. This is where a lot struggle. Also, the initial first drawings will take the same time, 2D or 3D, but it's after that that you get the time saving.
This is very true, you can go into 3D step by step. I now draw that far that from the first sketch, I get even the interior views for the client, and this in the same time I have Always done before. It's just that you need to build a good library and use some custom plug-ins, because those are invaluable! Architects are mostly against 3D because they are afraid it will take more time, and more time means more money spend, and more money spend means less for them.......
BIM/3D/4D is the future and we all need to embrace it.