I love all the small polish bits that you brought up--the slight randomization in spawning for example is such a nice touch that as you mentioned can really make it feel more organic and alive! Awesome progress on all the different types of soldiers too--I also though adding little flairs or hats would be a fun effect but I actually really love your reasoning about really doubling down on the senselessness of war. That's really thoughtful, and it's awesome that it sounds like you have a pretty functional (and fun!) game already!
If you get a chance it would be really cool to see a gif capture of the gameplay! (Screentogif is a popular program if you need one!)