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There has been various mentions of designers using Quartz Composer ( QC ) for interaction deign but from what I have seen it's been vague talk because people find the learning curve to be too steep or lack of resources to learn from a perspective of UI design.
What I hope to do quite soon ( once I finish college ) is to record a series of video tutorials in which I build an app to the best of my ability using QC. Im not talking about starting from scratch and building all the assets in Photoshop/Sketch and then animating them. The assets will most likely be bitmap screenshots as the main focus with this is to demonstrate QC, it's tools and it's workflow.