I have been benefiting from it by withdrawing four or five items that fit me and depositing a few that I know I might have liked had I been at the proper class/spec/rank. So long as we try to make sure that items within one specific rank range do note take up most of the slots and only place the items with stats that we think likely are really useful for the relevant class, I cannot help but imagine that it would benefit others as well.
While admittedly the space is very limited, do we really, at this point in time, have anything better to use the space for? Rare crafting ingredients? Do any of us at this point in time really know what crafting ingredients are worth saving for future use (and which can be bought at the guild merchant down the road)?