In my experiences I've found that when I want to edit multiple shapes of the same type (e.g. 10 rectangles) and apply a property across all of them (e.g. rounded corners at 100%) that when I select the 10 rectangles the only batch operations I can perform are generic (e.g. convert to curves).
1 selected rounded rectangle:
2 selected rounded rectangles:
What would be great is if I select multiple shapes/paths/items of the same type, that I can then change the type's properties of all those selected items.
Edit: To extend this functionality, I'd like expression modifiers (e.g "width: +50px") which would relatively modify each individually selected item's value. I may have 10 selected objects which have varying widths which I just want to increase 50px, rather than set them all to a uniform width.
