That 'Major Advantage' that you speak of, does it include the fact that the units receiving the affinity gain NO experience whatsoever? Can never be leveled up or promoted? Start at 2 strength, and gain the rest via affinity, which any of several civs can completely negate through immunity? In my opinion, it's overcoming a WEAKNESS, not a major advantage. Also, I did not design them. I incorporated them, added a unique terrain rather than desert, added a worldspell and a new leader. The rest is as they were designed.