They're still dumb. 1.8 added a relation hit for warning a nation, but that relation hit wears off ten years before the warn does, so it's possible for your nation to be warned by someone and actually not care, much like how it was prior.
Also they don't clear until the end of the year, regardless of what month of the year they were supposed to end in.
Also they don't clear until the end of the year, regardless of what month of the year they were supposed to end in.