With the seasonal adv I base the one I will play mostly on troop losses, speed u can complete & egg loot. This event it was Traitors, over Halloween it was Outlaws, both single player.
Most of the settlers playing world would of also chosen the same route.
Maybe in future you could use better 2 or 3 player adv to get each game world more involved. Black knights was a drag but it got everyone together, lootspots could be easily distributed to friends/guilds. What BB need are testers to play these adv and record losses compared to loot.
With your current seasonal adv selections you are forcing us to play the one that gives the best reward, compared to time & losses, its always the same because hardly anyone will play an adv that takes longer to complete with more losses rather than one that takes less and has a better event resource reward.
You need to find a balance then, maybe more testers, better rewards for those unplayable adv, etc.