From what I know about what's going on IC, banning Allison from Astrum could be made to work perfectly well as an IC thing.
No, it is not. It is a punishment on Allison.
Just because it happens to have the effect of delaying your ability to do what you want with the duchy does not mean that the judgment is a punishment on you. That is extremely small-minded and selfish thinking.
Oh, so making it so people can't play the game normally is supposed to be acceptable? Very well then.