The Checkmate described in previous comments is one of the reasons why I gave up my idea of a three-way variant with FIDE, Shogi, and Xiang Qi armies. Arranging the King and Queen one way would result in that Checkmate. Swapping them over would result in the XQ player capturing the Queen on their second move and the King having to capture the Cannon to stop further captures and losing the right to Castle. It would diminish the FIDE army's advantage but tend to make play stereotypical. Better, I suspect, to start with better-balanced armies to start with.
Perhaps it would be better to substitute a Yang Qi army for a Xiang Qi one, with something - a Pawn, as it happens - in front of every cell of the Cannon rank. This would stop a Cannon threatening any enemy but a Pawn - all of which are famously guarded in the FIDE array anyway.