I see GIMP users as coders who want to do some web design on the side or fix something really quick to fit the website layout. Basically, web-related stuff. I wish GIMP would design the UI to cater to that demographic/ needs. Or maybe it already does, I'm just not the audience.
I've been using GIMP for a long time and I've always found it very intuitive and it does everything I need from an image manipulator. And I'm a coder who usually just needs to quickly fix something to fit into a layout (not a website layout, but close enough). So you may be on to something there.