You're entitled to your opinion, of course. I personally feel the game is deeper all things considered

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1.) Why can't both things be true? Why can't it be true that the game is obviously dumbed down/worse in some regions (e.g. OOB, air combat, ship combat, no ability to bomb a certain province, no fuel etc.) and some areas are way more complex/better (e.g. division designer, production, frozen rivers, mud etc.)
2.) People who loved HOI3 do not believe that it was perfect, but they loved that they needed to micro units and that you could bomb a specific region etc. The little micro I saw in HOI4 (I watched all WWWs twice) is more like Starcraft or C&C. That's not what HOI-series was ever about. That's what people don't like. Yes, on a strategic level Starcraft is less complex than HOI3. That's the problem.
3.)
a. The first game I will set up (I'm not gonna buy it. I'm gonna test it first. A friend of mine will buy it, so I have access), I will play Germany and I will focus on everything but moving/microing my troops. I won't do anything with my troops. I will give them one plan (simple plan with 1 army, 1 general and 1 attack line) for Poland, one plan for France and (here's where it's gonna be interesting) one plan for Soviet Union. If the AI manages to win easily against all 3 nations without me interfering other than giving them x amount of troops, I won't buy it. That's what I use as evidence to determine, if this game is dumbed down beyond recognition or if it is still worth my money.
b. The Devs said, they wanted to stop people from automating everything. That's a good thing in general, BUT if they reversed what players did in HOI3 (automate everything but combat and production) and automated combat instead, I would be very disappointed. And that's what people see, when they see WWW. They see a game that is literally reverse-HOI3 when it comes to gameplay. HOI4 = 90 % other stuff, 10 % combat. HOI3 = 90 % combat, 10 % other stuff. I really hope, I'm wrong, but that is what we saw so far.
4.) Again: Yes there are some really, really great improvements and HOI4 is indeed deeper in some areas, but you must be blind, if you think that this game is deeper than HOI3 in general, because it is certainly not - maybe 3-4 DLCs from now, but not today.
5.) "Muh feelz" is NOT evidence. Pointing out that some areas of this game are indeed "dumbed down" isn't invalidated by your "feelz". I hate these "I personally feel"-arguments, because they are the ultimate non-arguments. "I personally feel that vaccines don't work for me." Great, you're still wrong and there is evidence to demonstrate that vaccines work. Just because you choose to ignore this evidence or just don't care about illnesses in general, does not mean that you are in the right. "Muh feelz" is the freaking opposite of an argument. Learn to use reason. It really pisses me off, if people are more about "muh feelz" than about reality, reason and evidence.