It would be a great "what if" scenario in late game, especially since it almost sparked the WW3 in real life.
When Yugoslavia announced they no longer want to be part of Cominform in 48, Stalin was so pissed he put armies on every single Yugo neighbour country and started threatening with invasion. But the orders were clear that the country will not submit and if a single Soviet soldier will cross the border they will get shot. Not to mention Tito also had backing of Allies despite the fact that the country was a communist state, which is what earned him so much reputation not just within Yugoslavia, but across the world.
I think this would work with the decision mechanics in WtT, maybe in a future update.
If SFR Yugoslavia joins the Comintern, there'll be an event chain of some of the most important disagreements both leaders had. Effects are worsening relations, then PP gain debuffs, then a loss in stability, then both of them refuse to trade with each other.
The final event for Yugoslavia - where Stalin's assassins fail to kill Tito - is the last straw, and Yugoslavia can unlock a decision to leave the Comintern.
The result is that Yugoslavia can create the Non-Aligned Movement faction, special in that any ideology can join. They'll all gain the Neutrality national spirit on joining, if they haven't gotten it already, and almost never go to war afterwards.
However, this also starts a border war with the Soviets and whatever Comintern neighbors Yugoslavia has.
Plus, Tito was possibly the closest historical example of an
actual benevolent dictator, which is why I respect him. Authoritarian, sure, but he wasn't afraid to break the rules of communism for the sake of making his country happier and economically stronger - they were even socialist rather than communist at times. Most of his policies worked wonders for the Yugoslav nations and let them enjoy peace for decades.
Just for fun: here's the border war in a nutshell, courtesy of Punch magazine.
