DaxOmni:

Some interesting views expressed above !! Never mind, on we go.

The seating plan you have linked is one of the current proposals informally known as the "555". This has 96 Business and 103 Premium Economy seats on the Upper Deck and 22 First and 334 Economy seats on the Main Deck. The rise of 4-class, and of Premium Economy (and the reduction in size of the F section) has actually happened since the original A380 plans were devised, and has led to this suggested rearrangement, which still would segregate things by class. An expectation would be that F pax would board by the forward premium jetway (Upper Deck) and go down by the forward stairs to their accommodation.

The reference to the executive areas on the "Optional Lower Deck" is to an optional third level below the Main Deck. I don't think you have understood that one of the A380 options is for a triple-deck layout (not a part of the 555 layout). This lower level (reminiscent of what Lockheed offered on the Tristar, which only a few took up) can be instead of some of the cargo area. I believe it will not be certified for occupancy during takeoff/landing. Some airlines may prefer to use ths area for additional cargo space instead.

Any more information required on the A380, please just ask.