There are many ways to fight against Necropolis. They have been described many times. Therefore, I am against changing the rules. Almost everyone uses the "cancel" option anyway, and it's the best way against any castle. ;)
We play not for the sake of winning, right? But for the fun of it (at least, not everyone plays for the rating). It's easy to cancel a castle, but introducing it into the game is the main task. At least, I won't let my opponent have it in its current state. Is that good? An entire faction has been removed from the game.