How about BB adding a bonus award for guilds who achieve 100% completion on a guild quest? Could be extra guild coins, some sort of trophy, extra event resources?
We achieve 100% completion quite regularly, and I know Zon have achieved 100/100 on one occasion. Must be other guild who sometimes make the 100%?
Ok, won't be popular with those who have dozens of inactive players but might add some spice to the guild quests?