Considering the upticks for this compared to every other post (except by Wiz) I have a sneaking suspicion that allot of people see that the black background of the project lead and auto-click agree... Thanks for getting involved Wiz. Barrois was the only claim France had, and it was the war goal they agreed to fight for, a player is hardly going to give the province they declared war to an ally. The -106 malus popped up directly after the war, and for the other province they didn't even have a claim.
This is a good idea, however it would need to be carefully implemented or it could end up with various allies with counter claims refusing to go to war allot of the time.
This sounds like a solution. Contrary to some posts on here I'm not bitching because my perfect game was ruined by the AI not doing what I want, it's the abruptness and size of the malus I received. -106 to relations for because they have a claim on a single province, then decide they want the one next door as well (with no claim) is far too large. If they were two of their cores it would be understandable, as it stands its pretty rough. Bumping off a major ally over two non-core provinces feels cheap, if it had happened with a gradual deterioriation of relations as described above, that would allow the player to plan ahead and obvious reasons of why your ally thinks you're a dick.
Screenshot below is where my game is now 1530. France has now rivalled me but I've got Castile with aragon under a PU so the hurt will be heading France's way very soon. They now want 5 of my provinces, they have claims on only two of them but the Malus? -47. WAD? I think not....