We've reported improvements. And there have been more every week. See About Graphviz Plugin
Good news. A circuitous path through wiki's core javascript has been straightened thanks to eric and paul90 who have resolved the occasional loss of proper title capitalization lost along the way. github 
digraph { rankdir=LR "Trouble" -> "Big\nTrouble" -> "Big\nTrouble" -> "Big\nTrouble\nResolved" -> "Trouble" }
We've worked through an example where nodes usefully create wiki pages when clicked. When nodes have a place in the real world we recommend pages be created from a suitable Location Template.
This week we now support numbered nodes that are only given names with the [label="name'] annotation. Here we define a cycle to which we attach a few labels. github
1 -> 2 -> 3 -> 4 -> 5 -> 1
digraph { layout=neato 1 -> 2 -> 3 -> 4 -> 5 -> 1 1 [label="welcome\nvisitors"] 4 [label="dojo\npractices"] }
Last week warmed up so I toured a number of new neighborhood trails and parks. Here I number my stops 1 through 7 and label each with the geographically informed page I wrote for each. See Pandemic Wandering
This is mostly the work of Eric Dobbs with cheerful support from other core javascriptors.