So it was made heavier - and once again they fail to meet their stated range/weight predictions
Er, ...no, they didn't.
Strenghtening the wing only required about 30 Kg worth of reinforcements. Not really that significant on an aircraft that weighs 280 Tonnes empty.
The A380 has met or exceeded every design target performances when entering airline service. It's fuel consumption is slightly lower than forecast, due to better than expected engine burn, L/D performance and general aerodynamics (that huge forehead apparently helps a lot...), and bound to improve with time, all this despite the aircraft being 5T overweight.
For a bit of perspective, the 787 is well above 5T overweight (around +8%), for a much lighter aircraft, and the first batch of airframes will largely miss their design range (-10% to -15%), payload and probably fuel burn specifications as the Gen-X weren't performing as good as expected on the bench, though that will improve.