If gimp's(or krita's??) code would be used as a library for blender's image editor, I think it could have several advantages:

-No need to maintain a big part of code, just maintain the connection to it
-Gimp is growing steadily, with some new core improvements in the upcoming version(gegl)
-Far more complex image-editing handling
layers, tools, selection,...
-better performance(i tested builds on linux, gimp is faster with painting images)

Things which are currently better in this area of blender are:
-brushes, brush settings(they are messy, but still much better than in gimp)
-blenders interface

this doesn't mean blender's paint code is bad- it's working nice, but still, i don't know anybody really doing texturing in blender.

Also, there could come the question, if it's a good idea of having such a complex tool for 2d painting implemented when blender is mostly a 3d package. But with the state in which it is now, it could be better to have nothing than a half-functioning feature.

it would be nice to be able to parent ideas, since sometimes, ideas aren't duplicates, but are similar and can be made up to a certain hierarchy.
for example, the currently most popular Snap to Ground request could be a child node of some good snapping proposal. this way admins can order things better and make more advanced proposals parents of requests for subfeatures.

I have made a propasal in the wiki about an advanced snapping system. Read it here:

http://wiki.blender.org/index.php/Proposal_for_Advanced_snapping_system

I'd like to be able to override scene settings with passes. e.g. scene can have an active camera, but in the pass, you could set "use scene camera", or fill the pass camera. The same could be done for render range and many other properties.
Reasons why this would be usefull:

more flexibility
with camera per pass - stereo-rendering more easy
range per pass - render e.g. shadow pass only for frames in which you actually see the shadow or similar.
It's similar as setting pass material or lights currently.

I think this system for forcing certain values to others opposed to as set in the scene could be made more general, an overrides system or something like that. I mentioned properties which I would like to override like this, but I can imagine various production cases can generate many more needs for flexible use of such system.

Vote for if you think so. I'm actually not sure. Do the developers want such an area here, or can be developer questions needs be satisfied under the yes/no voting system, together with ba thread and comments?