I was going to greate a simillar Thread too this we (have all dlcs in hope for a better gameplay) what i like and what i disslike and what could maybe done better but went with the uninstall buton.
Once you stop playing seriously for a moment and just evaluate what you're seeing at some points during the game is just mind boggling. I am talking about 400k men pockets with zero organization being ignored by the AI. Dozens of German tank divisions suffering attrition in the Alps or getting port sniped in North Africa. AI wasting its troops in literally impossible fights for a single province. That one division which will keep attacking with 0.1 organization until it's shattered. The singular AI modus operandi which is EXECUTE BATTLEPLAN ALL OF THE DAY BRO.
Thats all true and happening all the time. Combined with a non evaluation of movments mean that there is an additional wave of single division suicide attacks every time you take a province.
Troop deployment, This was something that was broken in HOI2 and HOI3. Why is it still a problem !! The other countries of the allies places troop anywhere they feel like be that Greece is being invaded but they send troops to Syria or Malta. I have seen them sent all over the world rather than protect the country they were from.
I was optimistic because i havent played for a long time and the fronts seemed pretty solid but then: Romania and Polen have been my Puppets (bought DoD and wanted to test some of the new features) and during the war with the allies (an while still in peace with the sovjets) the romanians decided that it is more importand to guard the whole Axis-Sovjet border from the black see up to the east see instead of beating back an invasion of their own country (had to send an army from france down there to beat them back while the romanians where sitting in poland and elsewhere guarding a "peacfull" boarder between two froeign countrys).
As i said i played a little ahistoric because i bought DoD. Ans i have to say the most frustrating part of the game, maybe beiside the braindeath battle AI are the focus trees (and the way the AI is handling them) and unlogical events. There is no option you can pupped the whole of yugoslawia through the german focus (i could have annexd and released it) so i went with the puppets croatia and "rest"-yugoslawia. Just to see an event/focus fiering (dont looked it up because it does not matter) where two things can happen, first you will get a wargoal on your own subject because the gouverment changed or there will be a civil war where the game tells you that you cant intervine in this war "IN YOUR OWN SUBJECT" because WT is below 50. And after some years you loose your subject because the random focus selection said join the allies, wft? (the focus just cheks if YUG capitulated once and i took it via event -> no capitulation). You can just declare on the allies to prevent this.
And then Italy just declared a war alone (was at peace at that time) on Germany, Hungary, Coratia, Yugoslawia, Bulgaria, Romania and Poland because the focus said declare war on greece which was also a German subject (Yes Germany has a focus on Greece to so why cant Italy check the geopolitical situation befor declaring this war).
Personal opinion: the focus trees have to go
(Edit: or at least be much more felxible, no fixed effect and a effect generation based on the geopolitical situation)! Introduce "Leader Personalitys" where you get your "gamerule breaking or event" stuff from. Lets say Musolini gets some sort of inferiority complex traid where he can choose a country on which he gets a wargoal whenever a european faschist country annexes another one
(Edit: after rethinking it that can solve some of the issuses but not all, so keep the focuse trees but make them open on the effect sides to be able to keep up with an ahistorical game). (Greece looked like a compensation for the German took of france). Also i never undersut why vinchy france has to be a special event? Just give every country the option to install a puppet in an capitulated country if the faction support is over 30%.
Ps: useless fact, i came to PDX games because of Hoi 2 and to this forum because of HOi4 (played 2 and 3 and wanted to be informed about 4).