Whatever is revealed there are a few certainties. The vampires will always kill, regardless of what is revealed, perhaps it will change their perspective, but nonetheless, they will kill.
So if we assume the worst, the night watch reveals the guardian or the trigger happy tribunal, it may harm that role, but it will still narrow down who the vamps may be.
I have also have been assuming the same thing, @yebellz.
May I put it out again, that the night watch could reveal themselves, without revealing what they discovered?
Let me also go ahead say I will likely be forced to vote within the next four or so earthly hours, or possibly in the early ours of the next day… as my corporeal self must report to its corporeal duties…