We are using Havoc Warriors and Sky Dwarves...two extremes, to see how well a shooty army does against a swarm army. I know from having done a test with Grimdark that this is going to be brutal, and that is fine. Reality is that the rules look quite solid at this point.
On purpose we chose certain units and the game is lethal. I suspect what we played at the level we did was just good enough to get mechanics. But war warriors are likely not as good anyway. I was looking at the gods of contagion list. Now that one looks much. much better. But putting cannons with Havoc Warriors for war will work wonders though.