climb through barricades of any level
"At any level"

-- making the barricade useless.
How about the zombies and the NPCs

I don't need to make a suggestion for zombies to the effect of yours because they don't need one any less than vampires do in this regard.
Why were you speaking for the zombies thenn

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Okay, maybe you need a longer explanation. Here goes (bear with me here):
There used to be a certain "Rock-Paper-Scissors" kind of balance around here. Namely, Vampires kill Humans, Humans kill Zombies, Zombies kill Vampires. Vamps kill Humans cos they can sense and get to humans easily, while humans can't find them as easily. Also Vamps can turn humans easily, while Humans can only revive, which doesn't do much unless you're a new vampire. Humans kill zombies because humans can revive zombies, and zombies can't do much about that. Neither is it easy for zombies to find humans, with Hiding and Cades and etc. Lastly, zombies kill vampires, because zombies can easily turn vampires with their infection, and there isn't much a vampire can do about that. Vampires can try to turn zombies back, but a zombie with 70 health and infectious blood is likely going to turn you instead. So the balance held out nicely, except for the efforts of groups here-and-there to distort it.
It no longer holds out, obviously. Recently, there were only, like, 3 vampires in the whole game? Before I started vamping there were only, like, 5. Versus 20+ zombies, many of whom are really Human players who found it boring to stay Human for so long (and 10+ humans). Indeed, the game was so imbalanced towards Vampires that we have Human players trying to get Vamped just so that they can play vamps. You have the leader of the number one human group (the number one group, in fact, by far) spending most of his week doing his best to get and stay Vamped, just so that he can play this side of the game. When I asked him directly, he told me he wanted to "know his enemy". He had to spend so much time and effort just to be on the side of his own enemy! @_@
So when you tell me that this will make cades "useless", this doesn't make sense to me, you know. I mean, suure, this will make it more "useless" for humans who want to barricade themselves from vampires, and make it easier for vamps to get a meal. But this ignores the fact that
the humans already control the game. You see chunks of the map in crucial areas EHBed (something you yourself have noted is usually difficult to achieve for human players). You see people I vamped getting revived, like, an hour later, and you see that happening repeatedly in a day. Whereas vampire players have to wait days (sometimes weeks, before I started vamping) to get back to their preferred class. It's not like anyone is having any problems keeping vamps out, and it's not like it's a problem when they fail to keep them out either.
I'm not asking for cades to become useless, you know. Just, maybe, let vampires enter non-heavily caded areas. Give us
some way to do so, even with increased AP or whatever, without having to tear the whole damn thing down. I mean, look at a vampire: it's highly intelligent, it has access to all its limbs, it can use physical tools just as easily and has no reason not to. Why not? The only reason why is because you think humans need the protection, which I am pretty sure isn't the case right now. It used to be, back when Vamps ruled Twilight, but it's no longer the case.
In fact, if you do so, you give a chance for vampires to play
with human players. You allow us the odd lightly-barricaded place to sleep from random NPCs, and from intruding zombies our bane. There's a basis of cooperation now, like how Humans and Zeds are cooperating right now, whereas before that it could only be Humans vs Vampires. Wouldn't that make for a more interesting, less rigid game?
I don't really expect to convince you, honestly, even after writing such a huuge post, because by all measures it does seem that Humans vs Vampires is your own mindset. It's how you've been playing it all this while, after all. And why not? After all, as a human player, the game never offered any possibility of playing any other way till now. As a stauchly-human player, you couldn't have seen it any other way. So I guess it falls to me to give the other perspective. Really now, after it hit 3 vampires only it should have been obvious enough. But ah wells. :/