On Kaen's post he is talking about each army having an "id". Here I guess, he is talking about once we get a BR with a spam there is the option "Battle Simulator" in the BR, when we click on it we still have to put the enemy units manually. Why doesn't it get the enemy units automatically? Lazy system? Or it's mean we wanna keep lazy? Well.. we need to think about it.
And ofc, we still are waiting for a improvement on BR's system Lazy ppl