Please let me know if my speculation is right. This effect would be most noticeable in the early game battles probably before you kill the enemies blokcing the paths between bases.
I’m not convinced that you have units in reserve is a good thing (even though it helps with performance). I somewhat disturbs my power fantasy of building an overwhelming army and just trashing easy opponents. Them fleeing helps sell that power fantasy though.
I also find the preportioned groups annoying you place in the beginning. I love that you can arrange them but the composition of them which are handed to me sometimes makes unit positioning i want to do impossible. It takes away some feeling of control and involvement with the battle. There could be a interface where you can divide your own units into battle groups.
In human on human battles having a skill that makes a hero a better commander (being able to field more (and therefor smaller) batlle groups) might be a an advantage, however that would require play testing. Another fun skill derived from that intellectual would be “Berserker” “You can only use attack posture but your every individual soldier is his own battle group”. This might be usefull with very many units swarming the enemy where the large groups are usually stuck waiting for an enemy group to be killed while being attacked, if the battle groups were smaller you wouldn’t suffer from this. So giving up the ability to have defensive more might be an interesting tradeoff.
