I am Egypt, I want 3 provinces in Libya. Oh wait! I can only fully annex them, make them a puppet or install a certain government. Well there goes my plans of getting those 3 provinces since I don't want to fully annex them.
I am Egypt, Libya declares war on me wanting to make me a puppet, I start winning the war push them back into the country, I don't want to full annex them but maybe take a couple provinces from them, have they pay me money for repairs and then have peace... OH WAIT!!! I can't do that, seems like I'll have to deal with every country hating me now since I just annexed Egypt.
I am Russia, Declare war on US, war seems to not be progressing and a winner can not be seen, my government wants peace. Oh silly me! I forgot this was a HOI 3 game and alliances (PACTS) have to fight to the death. There goes my plans of whatever my plans are.
You see what I mean? I want different ways to have pace. I know some of you are like "Ya know there is a take territory war goal", of course I know that. I still don't want to have to have this certain amount of land. I WANT TO CHOOSE THE EXACT AMOUNT, I don't want to have to fully annex the country I am at war with since we are both in alliances/pacts, I want to have a reasonable peace which should be available, I have never heard of the international law saying two alliances/pacts can't declare peace.