Idea for a future tweak/update thats just a immersion boost, when buildings (especially the stadium) are damaged it causes a much higher number added to the kill counter, to give a sense of what is going on.
Aside that, an option to make them grow say 50% and 2x would be a cool thing (like how the uranium barrels did before). Something as simple as perhaps when the kill counter reached 10k and 20k she grows?