In my company, we are sharing the .sublime-project file in the working copies as recommended in the ST documentation, it's under versionning control and workspace is not. So we put the .sublime-project file in the root directory of the project, then we use "path": "/" for the project folder because each of us works in his own working path.
It seems to works and i'm very happy we could share this project file.
But the only problem with this method is that the "Reveal in sidebar" doesn't work anymore when using "path": "/". Reveal in sidebar is very useful ! Too bad...
I don't know if it's a bug or if we use this path or project file in a bad way.