Hah they finally overthrew the dai li dude. But... So basically the earth king IS a buffoon. Still, What did the faing long dude think was gonna happen once the Fire nation break in? All his subterfuge and machinations (which lay undetected for years) will be for naught when the Fire Lord razes the city to the ground.
And it seems he still has a hold despite everything...
to be fair, the King is only a bufoon because Long Feing was keeping him in the dark his whole life. he does try to step up once his trechery is revealed.