I wanted to write some suggestions I hope Affinity incorporates in their future updates. I find a couple things lacking and one in particular with affinity as much as I love the products, which is, Affinity needs assets we can search within the program or have some pre-made assets like Canva offers on their program. At least Public Domain assets we can search to add to projects. Just like how we are able to search for stock photos within publisher and designer.
I think a cloud for storage and sharing projects from different devices such as ipads, would be really nice to sync those over to the desktop version to pick up later. So if you have an ipad with affinity designer and/or photo, and you have the desktop version on windows, you could share this project to the desktop version by syncing it to the cloud.
More brushes (textures etc.) and especially for brushes for drawing calligraphy and painting.
A better way to curve text I feel the curvation of text in Designer that's quicker than having to always draw an arch. I think having both options to draw an ark for font to be placed on and curves but also a way to do it off the bat.