So far I've read different post and have noticed a few things going on.
1. When they enter cities(especially at night) the vampires are attacking.
2. When playing on master difficulty the vampires kill people seemingly easily.
I personally don't see a huge problem with what is going on, none of my cities are ghost towns, I save all my npc's aside from one or two. It's not as if the vampires are traveling in hordes or anything :/
Anyways, if it is truly that difficult for people then why not take it off Master? Why not travel to the outside of the city and then enter? Why not wait till day break/mid afternoon when the vampires are at there weakest?
Save Save Save
As long as you are in the cell, and there are other NPCs "living" in this cell vampires can attack.
You can run by an orc stronghold, and it can be attacked even if you never enter it. You can run near Falkreath, never enter it, and it can be attacked. You can run by Merryweather farm in Riften, and it will be attacked.
I just find it interesting that quite a few people are not having any problems what so ever while others are in apparent chaos. Which makes me wonder what is really going on.
Am I getting the short end of the stick with the Vampire attacks? I would gladly trade my daily attacks for unfathomable attacks that wipe out whole cities and turn them into ghost towns. I feel Dawnguard added some content and upped the excitement a bit, but after hearing all these people talk about fire and brimstone in their games making it completely unplayable. I am beginning to wonder where mine is at.
I feel short changed if this is indeed true. More Vanpire Attacks!
Start searching the areas you passed by but never entered, see who's missing.