YellOut is a mod that lets you control the behavior of your troops. It has a very intuitive interface and a powerful API, so it is compatible with many other mods.

The most important change in the behavior of the troops is the addition of the option to customize the amount of delay between the order and the response. The idea is to make the response of the troops more realistic. The mod has a config file that lets you customize some parameters. With this mod, you can set the units to respond at different speeds and lengths. 

Hearing an entire formation of soldiers roar when you give them orders will give you a more immersive experience.