Please consider making writs complete automatically as long as the issue with getting kicked to desktop in Wrothgar persists. Spending fifteen to twenty minutes getting constantly kicked trying to turn in writs is getting really old.
I can read your frustration. Just a work around, until they fix it. I just go to Craglorn to pick up my writs. Do them there and then travel to the Shatol Wayshrine just North of Wrothgar. You only have to step foot in the city to deliver the writs from the road (where the guild traders are.)
It's not a fix..but might keep you from feeling like tossing your controller across the room!