What are the limits on what you can ask for in a peace treaty? Beyond point limits. If I were playing this game in single player, I have to say I would be really upset if counties like Hungary and Romania and Bulgaria started demanding parts of Poland and France, especially parts that make no sense.
You want to talk about realistic WWII; realistically if Germany won minor nations had pretty much zero options to make demands short of the Axis leading countries (Italy, Japan), and the restoration of territory ie. Romanian Bessarabia.
On top of the fact that, as the leader of the winning faction I should be able to demand certain territories be given to certain other countries - both in my faction and not. To the victor should go the benefits of redrawing the borders of conquered nations. Lets face it, post WWII some Axis allied nations actually still managed to gain some territory and get some pretty favourable terms.
Also will countries be able to sue for peace early? Pulling out of the war if they are willing to surrender completely? If as Germany I take out Poland and they surrender, since they surrendered I should be able to annex them without them getting a seat at the table in the final peace deal unless they are liberated. There should almost be a separate peace system for this in case its a country like Yugoslavia surrendering early and my allies Italy and Hungary want to claim some territory (or better yet, I want to give them territory) in the surrender.
This is an improvement from the lackluster peace system of HOI3, but it seems to have some potential for the same ridiculousness that existed in EU games although at least in EU games there were ways to sell territory for free to allies to make sure they owned what you wanted them to own. I think some more explaining is called for, this DD was not clear enough.