I see many people asking for 10 flags or more in alliance wars, because they want to use up all of their heroes. What’s the point of having more than 30 heroes, they say. Older players have nothing to do with the rest of their heroes.
But having more flags is just more work for a lot of players. So my proposal is; have alliance wars work like raid tournaments; have rarity and color restrictions occasionally.
In this way, people can use all of their heroes. As an added bonus, for more casual alliances, members who don’t opt out of wars they don’t fight in will automatically be eliminated because they didn’t field a full team fulfilling the criteria.