It would be good/great/fantastic for App Studio to have a default 'basic' mode, for example:
When run up (no login required) AppStudio has the ability to generate, test and publish a mobile app (without any analytics etc.). This would be an app based on the features of Titanium without the ability to add any modules (unless self created maybe? - i.e. not from the MarketPlace), or use any of the enterprise features available. This would also allow developers to work on the same code base without the current GUID restriction.
If a user then wants to use any of the other Appcelerator provided features, such as analytics, arrow db etc. then they sign up to one of the subscriptions and need to login to Studio to access the subscription features.
Perhaps even a basic yearly subscription could be levied against this , enough to make it worth while maintaining, but not too much as to put potential users off?