Out of all the super weapons in sins the Novalith is by far the only one that poses any significant threat. The Vasari and their cannon only affects the structures around a planet making it a good weapon to use before launching an attack, it can be countered by just sending in a fleet to defend the system after it's use and if your against the AI they don't exactly coordinate their strikes with fleet attacks. The Advent have their Deliverance machine which is very handy if you have lots of abilities that give you buffs when in your own culture but it's very easily countered if it's fired into the middle of your empire but its good when used like the Vasari's cannon and used on front line systems to help you attack and take that system giving you an advantage.
Now with the Novalith it's just a spammers paradise, the AI were firing them off in all direction and in just a few minutes Id lost half my planets (6 in total at that point) and they fire so fast your planets can never recover from a hit before the second hits and wipes it out, then by time the radiation has settled it's too late and the hit it again. I have seen this in Rebellion (thought the AI are really really pathetic compared to Diplomacy) and in Sins Diplomacy usually on hard. It's a cowards weapon and really breaks the game, it's not a tactical weapon like the other 2 races weapons, it isn't use din conjunction with an attack, it's just a point and shoot cannon that can not be countered in any way, I thought the Vasari and their research into limiting planet bombing damage and faster planet health recovery would help but apparently they have no effect on Novaliths.
The game loses it's fun as far as I am concerned when you give a faction the ability to just swat enemy planets without ever having to actually send a fleet, isn't the whole game about fleet combat? I love the game but when they start wiping out my planets every minute and not giving me a chance to actually try and counter them then it's not fun, the other races are fine, yeah they use their big weapons but they are more tactical and have to be used along side your own fleet (maybe minus the deliverance machine as you can wipe out the culture but again this can be countered and if fired deeper into your empire it has little to no effect)
So please either nerf the crap out of the Novalith or give us an option to disable super weapons in a game, I despise super weapons they break a game especially ones like the Novalith, just one or 2 isn't that bad but being able to build infinite ones is massively game breaking.