You know how all the branches highlight when you hover over a node in Graph View… I’m imagining a shortcut key like Alt-click that allows you to select the node without it clicking thorugh to open the page. It simply turns on the highlights on all of its branches. And if you Alt-click more than one node any branch path that has continuity between the two are highlighted in a contrasting color.
Alternatively, a checkbox somewhere in the UI could be ticked to turn off click-through mode and go into Graph Interaction mode. It would be cool to grab nodes of interest and drag them around and watch how everything rebalances around the adjustment.
Another alternative that addresses this feature request and would work with the other Graph Filter feature requests would be an option to simply color the filter results differently rather than hide everything that doesn’t fit the filter.