It's of course a lot better ever since they adopted that mod, but I still wish we had some kind of option to refuse/dispute places we occupy and start an immediate war without having to withdraw first.
This would actually be a very fun mechanic, and might help alleviate some of the problems with the current peace deals.
Ok, so it has to be a great war (i.e WWII). The big boys are at the negotiations dividing up the enemy. Rather than taking turns, the majors and people who contributed over a certain amount to the war get first dibs carving up the rewards. There should be limits to what people can claim, which would actually be hard to balance, but it should involve the territory either bordering one's own territory, or having a harbor. People pick what they want, and then map modes display who claimed want.
The peace conference is continuing, and a phase 2 can start where the people who claimed land start negotiating with the other powers diplomatically. AI should be balanced here to be very reasonable about what they exchange and sacrifice towards countries who contributed a lot to the war, especially if they are of the same ideology. AI should be LESS understandable to people of OTHER ideologies. Negotiations keep going, and countries either agree to exchange claims, or one country forfeits their claim on the territory to the other (Britain and Russia claim Denmark, both really want it, but they either negotiate a different territory, or Britain or Russia let go of Denmark to the other). Claims are just any form of peace reward, including territorial concession and liberation. Puppeting or changing government will put a "claim" on every territory the "puppeteer" insists their puppet have (so kinda like territorial concession).
If a territory is unnegociated, it will go who ever is closer, who ever actually occupied the territory, but the other nation who wanted it will have a claim. This is grounds for WWIII. Claims can just as well be a liberation casus belli for a nation, or territorial claim for a puppet/ally. BOOM, the game just got more interesting.