There are also a bunch more available information channels that this doesn’t use that could communicate more information. Color, shape, pattern line type, “backdrops”/groups could all be implemented to provide additional visual clarity on any range of parameters you might care about.

I used to use the dcc application Nuke and it had some very complex graphs but the different nodes were all color coded so zooming out you could get a good idea of what was happening where just from the average color of a section.

It didn’t have an auto layout algo as good as this though.