Ok, first really long game and some observations....
#1. Some nations have absolutely horrible intelligence. I know the AI is a cheater, but it's definitely cheap to not have them upgrade their intelligence over time just as the player does. The new intelligence system should be used more; I was almost never hit by any espionage at all because my system was so much more advanced.
#2. Many nations completely ignore naval warfare. They literally build no ships at all for the whole game and not even research in that direction.
#3. On the other hand, land warfare is extremely emphasized by some nations. I remember taking on 1945 infantry in '44, in Africa. Angola had been beelining infantry at the expense of everything else.
#4. On an amusing note, China had 30+ interceptors but they were never used. From checking out a savegame I saw that China had researched NONE of the air doctrines at all, despite having dozens of interceptors, and no other air units. The AI doesn't build and place air bases, though I don't know if this is fixable.
#5. Why are some techs dependent on the USSR being wiped out? That's a very big if. They should NOT get to ally with China. It results in Chinese having far too good technology, and the USSR having no credible opposition, unless I'm playing as Germany.
#6. France and Germany fought to a stalemate very easily. There was no French or German revolutions or anything. They were stuck. Germany was pushed back to Berlin and the western provinces around it, but had packed them so much that French advances were impossible. Kind of like North Africa in vanilla, where Italy and UK are stuck.
#7. Too much peace in general. Without any HUGE alliances like the Allies and Axis, there need to be more events to force the AI to fight, lots more events. Bolivia united South America and then did absolutely nothing else, despite being a credible threat to the whole hemisphere. Japan never even went to war. The USSR usually invades Turkmenistan and Siberia but leaves Ukraine alone. Maybe I'll try furious aggression next time...
#8. Lack of leaders for some nations. The Ottomans for example can't make a big air force. I tried but ran out of men.
#9. Lack of ministers.
#10. Tech teams are balanced *if* alliances manage to form. If some of the important ones fail, many nations left out become technologically backwards very quickly. Since the computer techs for some reason aren't researchable, there should be stronger tech teams across the board, but a few nations might need to be toned down, like Germany.
#11. Quebec is way too big for a puppet. Its southern provinces should be given to the ridiculously small Confederates, and the USA.
#12. Give cores to more nations, to encourage war. The USA has huge potential due to its cores alone. Ukraine (could be credible conquerors of the divided Russia), Persia (could easily gobble up Turkmenistan), Finland (should have the ambition of Scandinavian dominance, just like Sweden), and Germany (what about Anschluss?) are some of the most noticeable nations that could use more cores.
Overall a great mod with a lot of potential.