It be nice if they could add a auto sort that would also Stack all your items. In FFXI we use this to stack let's say you had item A "x5" but also other "x2" you auto sort and it would stack them together and make "x7"

Right now the only way to do this is to put all your item in the NPC and take them out which is a pain. I hoping they can try and add this for patch 1.20 it be a nice to have a good auto sort.