Eventually got Blender 2.5 to run today and wanted to see if something changed on the Texture Paint. To my disappointment all is the same and it is still lacking utterly important editing abilities. Anybody knows if they are planed to be added?
Spot painting. From sculpting we know this already. The image you use as brush is drawn centered around the point you click on the mesh. Texture Paint for some reason uses a totally stupid coordinate system locked to the window or something else nobody expects. This makes it very hard if at all to properly paint images using a brush like a stamp.
Another point missing is Brush Preview. In Sculpting if you resize the brush you see the image in a transparent way so you know how the next brush stroke might look like on the mesh. Texture Paint is missing this so it's guessing all the time what the next brush stroke is going to look like.
Another something which is missing is Anchor Painting. Again sculpting has this and Texture Painting is missing such a feature. This is very helpful to draw textures where you need good control over the result. Especially it prevents tons of undoing to get just one image right.
That's mostly all which is direly missing from the Texture Paint mode. Since sculpting has all this already it should not be difficult to add it to Texture Paint too.