For work with a large graphs is a great helper the neighborhood view and its Convert to Document function. To be even more useful please support the following:
display the connections between the selected nodes (the partial workaround is to select the edges of the selected nodes) - I read that this is a feature to not display the edges between selected nodes - why??? - do it at least configurable.
do not limit the number of elements (or adjustable limit)
allow to set the depth of neighbors (not just the 1st level)