Currently, there's a virtualenv with PWB in /srv/pwb, and it provides the default python. However, this isn't visible to most users. Make this be more visible somehow.
No, that's expeceted - you are generally expected to do source /srv/pwb/bin/activate. Also it is already activated by default (try which python), so this isn't about this.
This is about the fact that when you open a terminal it doesn't really make it clear that pwb is installed and how you can run scripts.