Some feedback... and perhaps I've misunderstood something. Here is the scenario: User A publishes a content pack. User B publishes a second content pack. User C wants to mashup (combine) the two content packs together. This is not possible, without the source PBIX files and a *bunch* of work. Even after the work is complete, there is no way for User A and User B to maintain their PBIX files separately without breaking User C's work. Big mess.