I played both factions on normal AI just to get a feel for what was new and couldn't get the enemies to attack me or even expand their empires beyond 3 or so planets. I decided to give vicious a whirl with one star, 60ish planets and 8 AI players. Vicious is an accurate description. In my normal complacency I lost a planet very quickly.
There were Novalith cannons firing off rounds within about 15 minutes. Every 10 seconds you hear, "A power surge of great magnitude has been detected." It gets pretty old hearing that. 1 hour into the game and you can't hold a planet as the Novalith bombardment is insane. It looks like Novalith sperm squiggling all across the screen.
A concern I had is that I agreed to a cease fire with a neighboring faction yet he kept Novalithing my ass. In the past you could not fire the Novalith cannon at friendly targets.