I propose a feature that would award trophies to top alliance players in each alliance at the end of each two week season. The trophies should impart some desirable game bonus. There should be a trophy automatically awarded to the player with the highest troop donation count. There should be a trophy automatically awarded to the player with the most medals. This would increase competition within the alliance and provide incentive to donate. There could be a trophy that the alliance leader can give to show appreciation to a player who has contributed significantly; player of the month etc...
Possible bonuses imparted by trophies:
10% hp bonus to all troops
10% atk bonus to all troops
10% faster troop production
Possible bonuses imparted by trophies:
10% hp bonus to all troops
10% atk bonus to all troops
10% faster troop production