Opening packs is a tedious process to the point where I have friends that troll each other by sending packs because they know the other hates opening them. Issues with duplicate items aside we need a better interface when opening multiple packs.
Maybe something along the lines of the quick sell screen. When packs are purchased it would open an interface that would allow for quick selling of unwanted items. So If I get 6 of the same set of boots when going for a robe I can sell 5 and not take up the extra spots that I have to go to the quick sell to get rid of. Each pack that is opened adds to the items on the screen and it could stay there until completed.
This would allow someone with say 70 free item slots to purchase more then 10 packs without having to stop purchasing and sell off un-needed stuff and the go back to purchasing.