I totally agree with you.. I need this system real bad.
Right now I have to use 2 PCs to trade item between my main account and other buddy account I got from CE.
And it's a pain that we can only trade for 4 items... this make trading whole items in bag to mule will take forever.

I don't understand why SE neglect this basic function and leave it like this for almost 1 year now.. ( 5 more months lol )

At this rate... I think this game will be "playable" in next year ... or more.. for worse case.