1- The Dryness of some focuses
The focuses are kinda dry and simple, mainly when i played as soviet russia, i saw how many focuses were just dry and too much straigt foward, like "modenize this" "build that" "change this", killing the giant potential that the focus trees of this mod could have, things work like you press a button and an entire national issue is resolved, there is no decisions, popups nor anything after completing each focus, with only sporadic popups (like when arresting that one murderer in moscow),
i suggest taking inspiration on the way focuses on TNO or TWR work, you do a focus, for an example: "industrialize the motherland" or smth, and then there are a series of little focuses below dealing with each sector of an industrial economy, metalurgy, cement, motors and many other things, and then, (just like in the already mentioned mods) you have a little option newspaper popup thingy (idk what they're called) that you could shove even more content into that same focus, not only that, but you could change the whole course of your country's ideology and/or government system with those decision popups inside the focuses.
(There could be for an example: a complication and leghtening of the dekulakization campaign, with a series more of choices to be made that would reshape the gameplay functions)
The most difficult part would be getting someone to write all these texts that would be inserted after each focus, but i still feel that's something doable to the magnetude of content that this mod already has, and that it would make both the gameplay and the lore astronomically better.

(I could help you guys if needed, i'm used to writing and am currently writing some articles about politics and philosophy)

2-The Unimmersive Tech tree
please change the icons and names of things in the Tech tree, it's kinda wierd jumping from a random mosin nagant (In the game being described as being ALL versions of the mosin nagant from Imperial russia right up to the 1930s) straigt to an SVT in 1924 or smth, add more variants of mosins, arty pieces and more era accurate technology so the gameplay is more immersive, this applies also to planes and tanks, that don't even need their numbers and stats changed, just a new png and name slapped onto it.

3-The "Giving of attention" to problems that at the time wouldn't be as relevant as the mod puts it to be
One of the most major things i saw was the importance given to era unimportant things, for an example Electrification, the content inside the country's problems, lore and etc would have a much more "well made" appearence with taking problems that were major in the region and era itself at the time,

4-(Minor Problem) Grammar Mistakes
There is a bunch of Grammar mistakes (nothing too major tho) just in many cases the mod switching the "z"s for "s"s, for an example "Mordernise" which is repeated many times in the soviet gameplay.

5-the spontaneity of the American Civil war
I just don't see much sense in the american civil war. Yes, i see that your team has put a lot of work into designing the docus trees, options and american reunification, BUT, sometimes it's just unrealistic.
(For me at least) it does not make sense at all for the KKK to be a whole player in the civil war, being an "empire" and being a major, appearent and visible player in the conflict, with it making much more sense to have a Christian Conservative southern confederation in the south, with the KKK more playing a secret role in the country, manipulating politics and making some very good examples of what racism in america truly looks like (maybe even making a critique to certain politicians at our current moment in history).
Also, that one soviet group near washington state kinda just doesn't make sense, there is no verifyable way of knowing how popular worker's movements were there, and it's just frankly wierd to see a soviet republic popping out of nowhere, with it being a MUCH better decision improving on the syndicalist faction around the great lakes and what would be the "rust belt".
About the rockefellers, it would be much more ideal to just chop them up into various other factions that would just be various fragments of standart oil trying to claim the legacy of the BIG rockefeller, making it some sort of internal civil war inside the company (when making that, it would also be nice to cut down ford's size and also involve them in the capitalistic fight for control over eastern america).

-Final considerations
The mod is Extremely well made, just poorly performed, it UNDENYABLY has a ♥♥♥♥ ton of potential that can be easily explored, it just needs rewriting and a little rework on how focuses work, and some little changes in the lore to optimize everything.

Awesome work.