Has there been any update on this feature yet. I have been using Designer now for two months and it is awesome. Our company specialise in drawing icons and illustrators shape builder saves a huge ammount of time when it come to creating complex geometery that is pixel perfect. We have found designers export tools and SVG optimisation is great for us and the grid tools are amazing. We still have to rely on illustrator for the majority of work a tthe moment , the shape builder tool would defonetely remove the need for us to use illustrator at all.