Adding a 3X combat speed would be a welcome improvement during big battles!
(Edit) Should have mentioned that having the interface on the battle screen would make switching speeds on the fly easy, e.g. Turn 1 – 30+ enemies moving to engage your bro’s, set speed to 3X. Turn 3 onward – set speed to 2X.
A wise general wins before the battle, while the ignorant general must fight to win - Zhuge Liang