I wish there was a keyboard shortcut that would quickly cycle through component instances.
It doesn't take much time to navigate to the top right of the XD window and select each instance of a component. But, I believe that adding this shortcut would save countless hours.
To adjust a single element within each instance takes a moment to achieve. For example, the gif below is 38 seconds. When seeing this time I decided to set up a mock run as if this new feature did exist. On the artboard, I duplicated the same button and arranged them side by side. One button in the default instance and the other set to the hover instance.
The mock run went as follows. Adjusted the text in the static instance, deselected out of the component, and paused for 1 second as if I had executed a keyboard shortcut. Then immediately selected the text in the hover instance component and pasted the same text into the button. The new time was only 15 seconds.
Switching through component instances takes a lot of time
My dream user input path: Select Component > Select Element > Edit > Select Out > Keyboard shortcut to toggle component instance > Select Element > Edit > Deselect > DONE