“If you’re happy with APS-C, you’re already in really good shape for lens selection. There’s a lot to choose from, and there’s no chance Fujifilm will abandon the format anytime soon. If you’re waiting for a a complete, compact, full frame system, it’s possible you’ll have it in a little over years after the X-Pro2 is released, provided it is in fact full frame. Fujifilm have already shown they can do it.”

Fuji VS Fuji have it right. If ~35mm full frame is the next logical step in iterating the X series, it is an important one. If you are a dyed-in-the-wood APS-C fan, you already have what you need. Stifling innovation with "FF no-no" helps no one.