You say you as if it's a single person that despises these vampire attacks, in reality it's the majority of people.
Now I get that you're grateful to Bethesda for being given the opportunity to be a beta tester, but please respect that many many people hate these vampire attacks even if you happen to not mind them.
Also another thing, the people who do not mind the attacks are probably all playing as vampires, in which case the vampire attacks are not even happening for them, so they have no idea how it even works.
I've been attempting to play my vampire character for a great while now while dealing with these attacks, so sadly vampires get them as well.

I did get a random event while leaving Windhelm that I thought was awesome though. It's the one where the Vampires kill the Vigilants, then pretend to be Vigilants to lure you to your "death". I also like how they made it so that vampire NPCs can detect that you're a vampire, and will comment on it while they still try to kill you. The random city attacks, not so much.
The people who actually take the time to post on the Forums are not the majority of people.
Are we going back to that minority vs majority issue again?
Very careful planning yes. If they enter by gates I'm guessing it could work in places like Whiterun if you have some potent undead fear spells (btw you do not need illusion to scare vampires, they are undead so any spell effecting undead should effect them, necromage perk maybe making them even more potent), micro manage follower to stand in spawn points and have use of dawnbreaker?
I'm can see Riften and the others as well as the open towns being a problem though if they make use of any gate.
Even in Whiterun they find a way to bypass the main gate, it's rather rare though. The other cities with multiple entrances (Riften, Solitude, and Windhelm) are the more problematic as the Vampires can spawn at any of those entrances and start slaughtering people immediatly. That's kind of why I think it's a bug, if it spawned the vampires at the same gate you spawned at, it probably wouldn't be such an issue.
Of course then there's the issue of the vampires spawning in while you are exiting Dragonreach (or other castles). By the time you even notice the attack the vampires have already killed one or two NPCs (if not more) and are hard at work taking even more down. If the vampires spawn with Deathhounds (frost cloak damage), other Master Vampires (mass damage), or Gargoyles (mini tanks) then it becomes even more problematic.
I'm making the same arguments as I did when people were crying bitter tears about the Dragons attacking cities. I made the same arguments when the polls worked in my favor on that subject, I'd make the same arguments here.
The Vampire attacks are no different than the Dragon attacks on cities. No different.
Well besides the whole thing of being able to not START the dragon attacks...the obvious announcement of the dragons as they fly over the city roaring (and the music changing).
Granted the music does change when you finally get close to the vampire attacks, but then you need to find the attacks, move towards the attacks, and hope that no one has died by the time you finally reach said attacks.