This strikes as a bit disingenuous because although people are arguing about mechanics the actual substance of the debate is about the approach to a specific aspect of the game. Mana is a mechanic but the changes to warfare in Vicky3 are a fundamental change to the way the devs are designing it compared to other Paradox games. Players are not going to able to micro things like they can in other games regardless of what the specific mechanics end up being so if you are into micro managing units on the map then Vicky3 isn't the game for you and you should play something else. The devs are taking suggestions but ones that fit within the framework of the mechanics that they are using. Suggesting that players should be able to micro units on the map isn't really suggestion because it isn't going to happen.
"Jack of all trades but master of none." This is a real problem with games that try and do as much as they can. Vicky3 is a society sim, as the devs have repeatedly said, so they are going to try and make politics and economics as good as they can. And, since devs only have a limited of resources, which include time and money, other systems are going to be less well developed, which includes warfare in the case of Vicky3. Now, I seriously doubt that the devs want warfare in the game to be bad but, given the focus of the game, it is just never going to be as good as the rest of the game because war isn't a primary mechanic.