Nice fixes, though you might also want to mention the three countries we know will be getting idea groups.
But I've been able to surrender at no warscore by just paying off my enemies. Throw some ducats at them and they tend to roll with it.
And they'll always join coalition wars now? Oh so exploitable. Well, rest of the world, say goodbye to all of your stability forever because I'll take -3 (diplo ideas) to give everyone else -5. This only encourages further blobbing because now I can deliberately rack up AE to get a new neighbor to join the coalition, then [=DOW=] them to drag everyone else into a new war, take more land from some of them in less than five years without breaking truces, hurt my enemies even worse (-5 stab and +5 WE) and get a new enemy, all while making the old enemies hopelessly weak.
I'm going to go ahead and assume that Paradox are not out and out stupid, and so will make truces coalition-wide rather than forcing coalition members to submit to hilarious stability penalties. Breaking your truce with any coalition member will thus allow every coalition member to pile on you stab-hit-free.