A really "vague" post by me (for which I apologise profusely in advance)
As a Boeing pilot since 89 (McD D before) it pains me to say it (as a voracious "death to Airbus" fan too) a friend of a friend (who is in a fairly elevated position in BA engineering) reckons there is some fairly serious deficiencies in the sphere of fire protection/redundancy in this fancy electronic/no bleed air air con system.
Much too tech for me (hence my caveats & lack of detail) but, it seems the "dream" isn't realised just yet. . .shame, it looks really right, and as the old adage goes "looks right /flies right"