Trading large quantities of items

So a friend of mine was grinding up a berserker account and he settled on cannon fist as his chosen fighting style, naturally, we decided to give that profile some cannonballs. Unfortunately, when going to trade, you can only add one thing at a time to the trade. This makes it extremely tedious to trade anything more than ten or twenty items at a time, so the hundreds of cannon balls we want to trade is taking an irritating amount of time to do, not to mention being boring as all get out. Can someone with the ability to make suggestions make a post?

Edit: Apparently it’s a planned feature, never mind