The Sith were pretty enthused about it. Used a Force super weapon. The Jedi Council is dead now, but they were never part of the Army of Light to begin with.
Oh no. The war is alive and well. The Order was already pissed at the Jedi for bringing their militaristic views to the sacred planet, and therefore there weren't many members of the Army on it's surface at the time. It didn't quite go kablooey, but all life is dead on the planet. Similar to what Nihilus did.