A shape builder would be the one thing that would make AD better than AI. I recently tried to make a seal with the golden ratio. With a shape builder like in AI it would be easy to make, but even when I tried to divide everything and cut out the parts I didn't want by hand, there was a big issue. After dividing some lines weren't lines anymore! They were just tons of points, so it looks like a line. And even the shapes weren't always right after dividing, so there wasn't a way to actually get out the shape I wanted it to be. If DrawPlus has a shape builder tool, they have the know-how, so it shouldn't be such a big problem to implement a shape builder. Please bring it to AD!