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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Character artist Francis-Xavier Martins has shared a nice tutorial for ZBrush users. A short video will show you an alternative to using spotlight to sample colours from a concept and using them to paint your model in Zbrush.
The artist is a true guru of stylized characters. He has tons of Disney-style works definitely worth checking on ArtStation.