We can only see 4 sandboxes at a time when fully zoomed out. We have 9 sandboxes. Since we aren't able to zoom out further or rearrange the sandboxes we are constantly dragging the screen to pan up and down, to see the state of the orgs.
There is so much whitespace in each node, any chance you could lessen the padding/spacing between the lines in each box/env/node, or between the nodes themselves? Maybe proportional to the max nodes in a single column?