So happy to see this here! I used to play this a lot with my boyfriend - we were pretty evenly matched, and the game allowed for so much freedom which made every game wild. The most impressive feature is - in my opinion - the wide variety of commands you can provide to your units and how their AI interacts with them. For example, if you build a crowd of fast and agile grunts and make them match speed with a slower tank, they will still avoid enemy projectiles with their superior speed.
One of the features I used the most was the "distributed move/fight" command. That just made it so easy to deploy e.g. a line of heavy tanks in front of a line of artillery.
Or mines that were actually useful. I played a game were my opponent got super paranoid after running into the first mine field.