Well yes. If you can't snipe the lord ordinator and you can't snipe the enemy wizard and you can't kill or engage the engines themselves... Then you have failed to have a counter to pretty much any part of their army and you are going to have an uphill struggle that game. I thought the ballista would be in the 120-140 points range, I am a little surprised if they turn out to be 100 but not totally shocked and the sky is not falling. They will be a common sight at 100 points and it will be worth thinking about how to counter them when building a list. If after all of that works its way through the cycle of build/test/play and they turn out too strong I suspect they will get some nerf sooner or later.