Single Comment

Why can't the 'Next Chess' be 3D? This seems to be the most logical
progression of the wargame.

Though codifying the optimal field will be a chore in itself. A developer
might start with the simple 4x4x4 field, creating an effective game to
play on this tight area will prove quite difficult. But it will provide
for a simple introduction to 3D play.

Another deviation is to go beyond simple linear movement with the pieces.
Though creating complex movement will in itself not improve play.
Introduction of powers outside the movement and interdependency of the
pieces can add depth to play.

Pushing beyond the current capabilities of the computer returns the game
to the arena of the human mind. At least for a while. ;-)

Do not expect FIDE to soon give up the Mad Queen variant.