I do like like the name Shibboleth and its meanings, though appending [DEVELOPER] or [TEST] to the techtree and faction names could help prevent someone from unknowingly playing it. Of course, it shouldn't be included in official or even beta releases.
Perhaps we could introduce the concept of a "hidden" techtree, by adding <hide value="true" /> to the techtree XML, displayable by adding developerMode=true to the INI. Perhaps we're overthinking this, but regular players unknowingly believing that Shibboleth is a unique GAE techtree (which it is) meant to be played (which it isn't), they could be let down considerably and end up thinking the game is "rubbish".