Veo, thank you for this valuable feedback! This is definitely something we’ll have to consider and try to find a new approach for. Blueprints are, by nature, a closed beast so I’m not sure if this is something we can conceivably make happen with the content-only release; when we have the C++ implementation ready we’ll have a lot more flexibility on that.
At this time I’d like to formally request some input from Unreal devs - What’s the deal with blueprints and file references?
EDIT: Brain lapse, you can easily move the package after you import it to the engine the first time. Put it in Contents\Blueprints first, then open up the iTween.uasset blueprint. If there are no compile errors then you can simply use the content browser to move the iTween folder using "Move "