I posted this in another thread, but here are a few maps that you didn't list that I think should be removed:
Almerra CastleThe incline causes attackers to have to slowly tiptoe for like 30 seconds to get to a ladder/door, which is really boring. And after the first round, no one wants to beat on the door for the whole round. The left ingress route (go up ladder, jump off roof onto walls) is rarely used, so this map usually devolves into attackers going up the right ladder to a painful maul/archer death. One of the least fun maps for anyone that isn't an archer. Often defenders will just sally forth to the main gate, because that's one of the most effective choke points, and attackers still have to waste like 15-20 seconds just climbing up the hill to get there.
Native Hailes CastleThis map is boring to attack and defend. Attackers have to spend too much time trudging uphill, and the most effective ingress point is the one that requires the most trudging. The only viable tactic for defenders when the population is less than 60 (i.e. all the time on NA2) is just sit in the gatehouse and wait, which "pubbies" never do. When a banner stack/etc does have the discipline to sit in the gatehouse, it's a hopeless murder tunnel for attackers.
Holmet CastleThis one just has too many doors to break (1-3 for every ingress route). Beating on doors for half the round is boring. Defenders can't open/close the doors to their own flag from outside, so nearly every time attackers win, a bunch of defenders are watching helplessly through the flag doors, raging.
Of the ones you listed, Burg and Helms are the worst, IMHO.
I think Windhill is one of the funnest maps, what flaws do you see with it? Always epic fights on the wide stairs to flag and the narrow walkway above the flag (this is my favorite place to shield shove people to their death as well).