I use art boards a lot because they significantly speed up my workflow and management.
However, when I need to do some more advanced work in photo, it often is painful due to how broken the art boards are in photo. The root of most problems seems to be that photo ignores the boundaries of the art board and tries to perform all operations on the entire document causing lots of weird issues.
The better integration between apps is supposed to be one of the key advantages of the affinity suite, but it really falls flat in this area.
I really hope this could be fixed.