It's not a problem to be fixed. You Should be attacked by everyone at S4. However, if you are S4 BEFORE you do a quest for someone and BEFORE you join a faction, then they will remain friendly, and even fight for you, as long as you do not revert to S1.
Feeding and reverting to S1, will reset their disposition. Thus, they will become hostile when you reach S4. At that point you cannot win favor again.
For the record, I do not see it as a "problem". You should be attacked at S4, until to win favor of the NPC and/or faction. The problem is the disposition being reset. If something is implemented to remove the AoS at S4 from the game....then, that is the problem.
On that note, this may be moved as we can't discuss Dawnguard implementations in the Gen Dis Forum.
I enjoy playing S4-24/7. It forces the player to use the gift of Illusion to advance through the game. The best bet, if wanting to play S4 all the time, is to get Vampirism, straight out of Helgen. And waiting a week, before even going into Riverwood.
EDIT : Hail Kraujas!
