Yeah making choices wasn't really difficult for me, although it depends on where you're at. For example, if you've got a strong air force, you should keep some in reserve, but if it's weak, then go all-in. Despite the branching, optimization is pretty straightforward.
The choices I wondered with were those with unclear results, such as in which country should I deploy the ground forces, and what to do with the airships after the battle is over. I think Tak'kan and enforcing order are the best options, but we'll see.