I played a few hours of the new patch last night, and I have to say overall I like the feel of this. It definitely adds a lot more strategy to when I actually call in allies for my wars. Before it was "France, you got me bro? Now it is, "well I can get by without their assistance in this war, so won't call them here".
I do agree that it probably shouldn't be -1000, but instead each war have a stacking -50 or something that instead lasts 15 years or so. Then if you give them something that -50 becomes lowered if they get what they wanted from the war.
For instance, I am about to war Sweden(most of Scandinavia), England, Scotland, Castile all at the same time. England has been taking the coast and I don't mind giving France some land for their assistance. However. I feel there should be a way to avoid this malus entirely. Perhaps a "Co-offensive" war?
I mean it's clear France wants their stuff back, I want Calais, and to weaken Sweden, etc.
PS. Definitely loving the extra diplomat as Bohemia, even though I didn't get the burgundian inheritance, definitely my best game ever. I never know what to do when HRE Emperor and want to go Protestant though :/
PSS. Loving the new Papal options, now it isn't a mindless stack Mercantilism or Stability. I always want all of the benefits!!!