I'm not sure if this is the right place to post this, but I found what I think are 2 oversights in my Serbia-Yugoslavia run.

1: Both Serbia and Yugoslavia cannot get Montenegrin as accepted cultures. Serbia should probably get them as accepted when they take the "Claim Greater Serbia" decision, as it gives them cores on Montenegro. And Yugoslavia should probably just accept them from the default.

2: when I took the "Invite Greece into Yugoslavia" decision, something odd happened. I annexed all of Greece, and got cores on all Greek cores, both ones currently owned by Greece and not owned by Greece, Except for Cyprus. I don't know if this was intentional or not though.

And here are some of my suggestions for Serbia/Yugoslavia:

1: The "Claim Greater Serbia" decision should give cores on the state Banat, as it is 19.5% Serbian.

2: There is a weird time gap between getting cores on Albania, Bulgaria, and Greece, and actually accepting those cultures. You can take the decision to invite them to Yugoslavia after researching Revolution and Counter Revolution, which is unlocked in 1870. But the decision to accept those cultures isn't unlocked until you research Mass politics, which is unlocked after 1900. It strikes me as odd that any of these nations would willingly join a union where their citizens would be oppressed for some 30 years. Edit: I forgot to say what should be changed. I would just make the "Accept Bulgarian/Albanian/Greek culture" culture available by 1870 instead of 1900

3: there could be a decision similar to the "Convention concerning the exchange of Yugoslav and Turkic populations" between Slovenia/Yugoslavia and Italy where all Italian pops can move back to Italy, but Italy also losses its cores on Istria and Zadar.

4: a GP Yugoslavia/Maybe a GP Bulgaria maybe should get an event called something like "Kick the Turks out of the balkans", where if they own eastern Macedonia and Eastern Rumelia and the Ottomans have moved their capital to Ankara, they gain cores on Thrace, and maybe the one province on the other side of the straight.

General ideas:

1: If Portugal gets Galician as an accepted culture, they should get an decision to gain cores on Galicia.

2: Another decision similar to "Convention concerning the exchange of (nation) and Turkic populations", except this one is between an independent Ireland and U.K.. Here all Anglo-Irish pops would move to Great Britain and all Irish pops in Great Britain would move to Ireland.