What Affinity products do, they generally do very well. What they don't do--well, sometimes you just have to remember the low price. Right now it looks like Affinity is focused on the Publisher-Photo-Designer integration, rather than adding features such as this. That to me is a good thing, but if you're trying to replace Illustrator it can be disappointing. Sometimes I open up Inkscape (now native on Mac) for something that Designer can't do.