Alt click on a node connection automatically disconnect it from the other nodes. And there is some nodes which can be easily summoned by pressing a key and clicking at the same time. Like B+click will place a branch, and S+click a sequence.
If you're willing to compile it, Aseprite is a great option as well.
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Have a look at a free set of smart materials for Substance Painter by Aleksey Kudryavtsev. The pack features four different surfaces that you can use for all kinds of projects.
Substance Painter smart materials pack:
Wood, Antique Nielloed Silver (added few alphas in ZBrush just for better representation), Ivory and Ice (faked by Emission channel).
Check out another pack of 20 materials from the artist for $5 here.