You know, Rocket Artillery has been in the game for a very long time, why does Calliope rustle so many jimmies? Is it the all of a sudden appearance of a good artillery piece that annoys players?
1-Cause it has a similar damage profile with the Pwerfer. And people complain about the Pwerfer. People don't complain about the Katyusha cause it has a much worst profile (one would say balanced)
2-Cause it shoot the same amount of rockets on first salvo as Pwerfer. Katyusha 4x4 is way more balanced that 10x8/10x4
3-Cause it has 4x the amount of health and just like any other USF vehicle can be effectively decrew to save popcap.