Thought I would share my perspective (coming from a casual gamer) on HOI4.
Just sat through a 7-part tutorial on Youtube which took 3+ hours of my life that I will never get back. All that just to get a basic understanding of how to play this complicated game.
I thought the GUI was fine. My issue is with how complex the game's mechanics are. I would have preferred the game had been more streamlined.
Then again, I am more interested in making "grand strategy" decisions, as opposed to min-maxing every variable in a game.
Decided not to waste any more of my free time on this game but may revisit at later on in life after I retire and have much more free time available to devote to a single game.
Not a total loss as I was able to buy this game on sale ($38 for 5 packs: Cadet Edition, Together for Victory, Death or Dishonor, Waking the Tiger, Man the Guns).
Moving on to Strategic Command WW2: World at War. Heard that that game's complexity falls between "Risk" and HOI4. At least that game looks like I don't have to spend hours watching tutorials just to learn the basics.
Forgot to add that I absolutely adore the HOI4 soundtrack. I think it is brilliant. If only the game matched the soundtrack in its ease of use for a casual gamer like me.
It's funny, really. I recently picked up Steel Division after playing hundreds of hours of Wargame (a game by the same devs). I complained the campaign missions were a bit too easy. I went to Steel Division's Steam page and found lots of people, without those hundreds of hours in their belt, slamming the game for being way too hard. I'd forgotten how much of a learning curve those games were.
There was a good deal of complaints on game launch about how "dumbed down" or "streamlined" HoI4 was, but posts like this remind me that there is a marked for more of a "grand strategy lite" type of game. I think HoI4 and Stellaris actually were PDX' attempt to reach out to that market, with a game that's still complex, but more approachable than HoI3. Ironically, HoI4 was a pretty ambitious project that turned out really complicated in a number of ways. Working out how to best use the naval interface and battle planner without getting too many grey hairs, for example, can be an uphill battle. And the BP and the naval systems are tools that are in the game to
help you!
I had some of the same experience when dipping my toes into War in the East, a game that feels a lot more complex than HoI4. It took a long time before I really got into it, and I still don't play it too often. Maybe with more time you'll learn to like HoI4, maybe it's not for you. If it helps, I think/hope future patches and DLCs will keep improving the UI and the overall accessbility of the game, so maybe it's an idea to keep checking back on it ever so often. And hey, you got the music. Hold on to the music. It is indeed beautiful.
You post has made me wonder if maybe the devs should indeed make a kind of HoI Light game, though. Maybe it shouldn't even be called HoI, but it'd still be a strategy game where you juggle production, research, division-level action, and the other features of HoI, just with a bit less complexity.