is the warfare still broken
No
reworked it to include proper units
Also no.
The reasons that V3's combat was broken wasn't actually due to no units to micromanage. It was due to:
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Front splits & merges breaking frontlines (in most cases sending everyone home, so you'd have to redo them),
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No real decisions to make in terms of army composition and extra supplies
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1 battle at a time per frontline, regardless of how large the front was (Russia Vs China? Enjoy a 10 year war due to that issue)
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No ability to designate a priority target for your military
All of these issues and more have been fixed. V3 is not a game about warfare, it's a game about industry and the social changes that industrialization brings. Micro-managing a war would be outside the scope of the game. Micro-managing the exact inputs, with more supplies stressing your economy and national expenditure for more combat power if/when you go to war is exactly inside the scope.
I will die on this hill, damnit.