Thank you for your replies, lucky for all of us that MEB reports that all our wishes will come true!
I am afraid I started something without giving enough background...
In my profession I have about 10-12 images to retouch (meticulously) and then deliver to the magazine to their specific size. Every magazine as you know has different dims and every deadline is ridiculously short.
I shoot the image as close to how I would like it to be in the final, process to a tiff about 4000 x 6000 pixels (338 mm x 508mm) at 300 dpi, retouch and then crop down to the magazines dims, (generally around 226 mm x 290 mm give or take. So to be able to constrain a crop box to the magazines dims is essential.
I admire the people at Affinity and they are doing an incredible job. I'm sure that the program works for a lot of different people, but for what I do, at this point it is impossible. I also think the Blemish removal tool is too slow for fast work. I think the idea behind it is genius because it is possible to absolutely control how you blend the blemish away, but those few seconds moving the cursor around looking for the perfect fit... I feel it just takes too long, but maybe it's just a matter of getting used to it.
MEB, any idea when I should check back in about the update to the Crop tool?