No one is saying that the CoC system in Hoi3 was perfect, far from it. It needed some attention, but it did not need to be dumped. Tossing it out is like expelling the gifted boy with ADD for disturbing the class when all he needs is a little extra attention.
What I'm saying is this statement is premature. After all HOI3 had a supply system that wasn't perfect and air combat that wasn't perfect. Yet these mechanics are being replaced from what we know.
A CoC without it doing anything is a waste. HOI3's CoC was very close to a waste because it really didn't do much. Honestly outside of possible immersion what did it do?
So now HOI4 has a battle planner. There will be some kind of divisional assignments in it. But does the battle planner need to know that the divisions I assign to Rommel (corps) report to some army and then OKH? What does that add to the battle planner? Most likely nothing. But we have to wait and see when they post how the battle planner will look in it's final version. After all didn't Podcat say that it has gone through something like three revisions so far?