This is really excellent! I've been hoping for a while now that someone would build something like this :-) A direction that'd be interesting to explore is a g

This is really excellent! I've been hoping for a while now that someone would build something like this :-) A direction that'd be interesting to explore is a guided query writer. Perhaps have a floating query input box and if you click on a type, it adds a query. Then you could edit the query and as you add/remove fields & connections, it highlights the equivalent areas of the visualization.