Interesting concept and I think there's a great idea here buried behind some usability issues.

Having an option to go top down might help, as would ability to collapse branches and maybe zoom out/in to get a broader overview and then focus on certain areas.

In the left-to-right view I had to scroll down to get to the root of the tree and I was confused what I was looking at until I saw that - ensuring that the root node is always visible on load would probably help a lot.

Seems like something D3 might be good at, making it more interactive instead of static svg?