That looks really nice!
If you are doing the seat covers in future, I recommend adding a heated seat pad to each seat. It is surprisingly easy to do. I have installed heated seat pads on a few vehicles now. Also, don't get the "waterproof" ones. They just add a coating that makes them a little...
I do think it is interesting how they seem to be moving (with good reason) to using castings in the same way that Tesla is. Its interesting to see the compromises they needed to make to get it to market so fast, and yet still develop a strong platform overall.