I really like the blueprint, but there's one more thing i'd add to it.
Some button for reseting the image size or width/heigh ratio.
Hi, Indeed, I also had this kind of issues (I was working with sponsors logos, and had to change them for other sponsors).
But to reset the image size would be too much, reset the ratio is better IMO. Here is an example : - The original image is 100x50 and is 200x100 in Inkscape. - You edit this image in gimp and make it 400x100.
- What you want when you come back to Inkscape is an image that is 200x50 in Inkscape.
So this button should keep one Inkscape dimension (say Width, or the bigger or the smaller), and re-compute the other Inkscape dimension (say Height) considering the new image dimensions.
What do you think ?