This sucks, why take out an NPC that was the turn in guy for a series of quests? I had every single one of these in my quest journal, finished all but 2 of them before the patch. now I have 2 finished quests I can not turn in and need to delete. Who had this brilliant idea?
In talking with a GM today, they have removed this NPC from the game and there is no way to complete his quests. You will need to delete them from your quest journal.
They removed Dovan Farfall during one of the updates in December. I'm not sure if the quests that he finishes have been removed or not, or if there is a different person to turn these quests into now.