kwaigonegin
Colonel
Bltizo you think reliable ?
4000k is much less than 10% of displacement and when it comes to carriers it's certainly no biggie. In the Nimitz class there is a spread of 2-5k between vessels at any given day and their dimensions are the same. Some newer subsystems may weigh more, maybe extra venting,cabling, extra toilets
As you said deck area would be increase with a smaller footprint of the reduced island. 300 sq m^2 is like the size of a large house (not mansion) so it's entirely plausible.
Impossible to say if reliable until we see pictures however it is certainly not all surprisingly if that's the case.