Now I'm going to nip this stranded argument in the bud before it even comes up.
I am not against alternate-canon, but the new canon needs to make sense.
If the PCs are going to change the canon it needs to be sensible to the story.
I have seen to may GM/DM/ST modify the threats down to the level of the PCs to ignore it.
By doing this the threats are diminished to a point where you start wondering why they where even threats at all.
If a group of 4-6 rank 3 PCs can handle it how was this ever a threat to the armies of the Great Clans.
You can say that this was only a minor threat, but by doing that you have relegated the adventure to the level of side-quest.
As stated above, in a time of peace this would be a major accomplishment, but in a time of war its just a minor side-quest.
Again alternate-canon needs to make sense.