I've thought about this for some time. My idea would be to put around a dozen first class suites, galleys & some toilets in the forward galley - if you look at seat maps they take up a lot of space. You will probably still need to a serving point for inflight snacks, economy class toilets & a disabled loo on the main deck. Would it be safe for dozen or so pax to remain on the lower deck through the flight or would safety dictate they they would have to return to the main deck for t/o & landing?