These examples are probably craptastic, but they are just to give ideas of how you might generally approach this without screwing up the balance of cabalwars.

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If Outlander captures the Tribunal cabal item, then bounty prices could decrease, causing more trust in anarchy than legal justice, and vice versa.

If any member of Herald is in possession of any cabal item, maybe libraries and inns across Thera close shop until the crisis is over. Or else maybe the price of food and drinks decrease as a diplomatic measure.

If Scions possess any order item, then maybe city NPCs start disappearing, as dark scholars across Thera get bolder about sacrificing or experimenting on other people. Maybe something similar happens to mage NPCs if Battle gains the Scion or Nexus items.

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Cabal wars could also affect the inner politics of a cabal. For instance, if Empire holds the Fortress or Tribunal item, then maybe evil Tribunals have an advantage in being promoted over good Tribunals, since the Empire is in the background pulling strings.

Similarly, cabalwars with Nexus could influence how neutral PCs fare in the inner politics of their respective cabals.

Furthermore, I think Seantryn Modan must be destroyed.