I don't really see the purpose of this rule. Everybody can move diagonally. It would be a "fairness" rule if it was a match between the Chess Rooks nation against the Chess Bishops nation...
Any complication without a purpose, well, it's just a complication. And I'm all against complications.
morphles wrote:I would rather civ switch to hex by default, it's better in any and all regards.
In my compilation of pro and cons of hexes I regarded movement as a CON ("no diagonal movements - so less variety"). It looks like this is also a PRO, so why waiting for my beloved HEXES