This could put the game over the top and bring back masses of bored fans you have playing other games.
perhaps not a "boa" type of gear system but maybe winning "the scenario" = Mad EXP+Loot Chests for example. (think TL 2 loot chest chambers, like 5 chests explode with loot, perhaps equivalent to boss fight loot?) Just a thought. xoxo diablo pvper since diablo 1.