I'm new to Affinity but i'm already impressed - the crop rotate tool is very smart :)
Anyway I'm trying to understand the logic of Affinity only saving in it's native format, it's easy enough to export as jpeg or whatever but it seems odd that you can't save in the format you intend to use.
The other thing I'd like is a way to resize including changing the dpi of an image. Maybe it's there but i can't see it. Pixel size is useful but knowing something is a certain size in mm or inches @ 300 dpi is very important for anything that has to be printed. Likewise being able to know immediately how big something at 72dpi is important for web usage. A save for web dialogue would be nice too!