Achievements are at the moment character based and not account based.
In order to open chests to get collections (for one character) you need kill the bosses, for a chance at a key.
Keys are not tradeable, You can’t re kill the boss for loot (if you help someone else you get no items).
And I don’t think collection decks are either right?
This boils down to: You need to make a Crosair to open all chests to get your collections and other things. The stats you get from the collections will now be stuck on your Crosair only.
So here is the suggestion.
Give enough keys for all chests not just a chance.
Make the achievements account wide instead of character based
Make colletion decks Trade/sellable ( this way we can atleast choose if we want them trade them to ourself or sell them)
Make an account storage in the lodge.