I know this has been brought up before, but reusable "functions" (collections of multiple interactions) is high on my list of feature requests.
For example, I often fire several interactions on a single button click. If I want those same interactions on another element, it would be great to create and apply a function that contains all those same interactions, rather than copy/paste (which I do appreciate, btw). Then when I need to change something, I can update the common function and it will update all elements using it.
I'm curious if anyone else would find this useful.