Completeing missions for AFK players

I find this odd and i could be taking this completely different, but if it is how i see it, this needs fixed or it ruins the story line for others.

Alright so let me start off by joining someone who was AFK for a VERY LONG TIME. Since that player was only like level 1 or 2, they still had the intro missions from what i can see at least. NONE of my missions pop up when they are host so I’m assuming It’s their missions that I can see and complete. So this is where it gets… eh… If i can see that persons missions and able to fully complete it for them, where does that lead them to? they won’t ever be able to see the story line because someone else already went around and completed it. so the only other option is to make a new character and just… NOT GO AFK and complete it yourself.

I mean hell, sure… free xp for the both of you for completing it but like i said… they miss out on the WHOLE story line so they come back with half the map completed and wonder what the hell happened.

If i am mistaken by this and or this is really how it works, someone inform me otherwise, cause the missions already suck enough but this just tops it all off currently.