Loot bag/keg is a terrible idea for multi boxers, you can't trade the items in bag even if you already got it.

I haven't had any redundant drops in brewfest yet (2 rams so far), but for the winter lord event, one of my guy got 3 pets and can't give it to the other toons

They should mark the items in the bag same as normal drop so you can trade to other group members.