Please increase the number of attributes recognized by Power Duplicate, and let it use them all at the same time.
E.g. Imagine you could start with a square, round its corners a bit, add some color, change the transparency and line thickness, and only now would you apply the power duplicate.
You would end up with a chain of objects resembling more and more circles instead of squares, having more and more of the added color, being more and more transparent, and, and, and...
That would make life a little easier.
Alternatively: a blend/morphing tool as in some other applications. We would choose a start and end object, and Designer would allow us to transform them into each other, producing an adjustable number of intermediate objects.