I don't know how to post pictures, sorry. (need an url?)
The two functions I ask for are two very basic features.
I can do it with the plugins but it would be better if they were integrated in Paint.net.
It would be great if you could just have the choice to fill an area with the image in the clipboard using the paintbucket tool instead of filling with a colour.
For Photo Flood Fill I've got a problem as it makes white stripes between textures when I move them verticaly.
And for Outline Object selecting a colour isn't very convenient (You have to type the colour you want, you can't just pick it).
What I like with Paint.net is that it is really powerful because it is really easy to use, but those plugins don't have that ease of use that the main software has, that's all.
A last thing, I don't have internet at home, so I don't have access to the documentation (why can't we get an offline version?) and I can't get plugins easily.