An engineer writes....
Wait and see. I have never been involved in an aircraft project that didn't develop a bit of a weight problem along the way; some get slimmed down (back to the promised weights), others accept the weight penalty and the airline gets some compo - but more typically, the airline changes its mind about a few things and accepts that the thing may be a tad lardy.
Case in point - it is all very well for the likes of EK and VS to mutter on about the weight of the aircraft, but could they have put their hands on their hearts and quoted a guaranteed fixed weight for all those tarty first class seats when they ordered them? Bet they are all heavier than planned.... and so it will be up to Airbus to saw bits off the structure, or tell the airlines to lump it. A small item makes a big diffence - think of the weight of 500+ video screens for a start....
TA