Because of the outcome of Bretonia why would other houses go to war now? They can see how pointless it is to go to war, look at Kusari and Rheinland ending early.
We all love to see conflict between houses but Gallia should never have changed over night, Gallia should have kept its power and Bretonia should have gone into Resistance House whilst the Council still took the main Gallic house.
Daily reminder that once again a dead house gets all the starlight, whilst the one that mattered now gets annihilated.