- I like the Debug/Release options; they save me a bit of work. Beginners to programming and/or Visual Studio converts will also feel much more comfortable. (I know your goal isn't to duplicate VS, but a few crossovers like this definitely don't hurt.)
- The assumption that I will want my project in a subfolder of whatever folder I choose, with the same name as the project, is faintly irritating to me. Admittedly, I only have a few "projects" for which this wouldn't be suitable -- i.e. "solutions", containing multiple C::B "Projects", and I only have to set them up once. Still, semi-pros such as myself might appreciate a way to put the .cbp file exactly where we want when it's first created.
I don't like the idea of the subfolder either. In fact, in my (our) case it is almost always the wrong choice.
And if you want to compromise, make the compisted path editable. It is already listed to show the final result, so making that editable can't be too much bother. People who prefer the current setup can simply accept the end result, while others can remove the unwanted smartness.
Myself, I would go with letting people specify the path without adding a subdirectory automatically. Most other programs don't.
As for the debug and release, that is nice, but I find the choice of directorie odd. That may be because I am used to how KDevelop does it.