Hi,
A handy addition would be a Bypass node in the Material Graph. Essentially disabling a node but routing one of the inputs straight through (the primary input I guess) instead of stopping the output. If this was linked to a shortcut key it would be a very efficient way to A/B test what a node does to the rendered material, without re-configuring the links.
Best,
Liam
That is actually a pretty great idea, sort of like the opposite of the solo node C hotkey