This is a place to collect ideas on how to further improve the network visualization process.
This is a crucial functionality for a lot of network scientists. We plan to incorporate this functionality soon, in fact we already started working on it.
d3 provides a great API for tree styling. We should build an addition tree styling function.
Networks are often inferred to be hierarchically clustered. Different visualizations could be used to visually cluster these networks in a way that does not rely on a force-layout, e.g. with something like a Pack, see also here or with hierarchical edge bundling.