I know we are near the end of EUIV, so the remaining expansion(s ?) will mainly add flavor for countries. It won’t add new mechanics, but it can rework and expand some existing ones.
I would like to see a DLC focused on European countries that where not touch by Emperor DLC.
So Scandinavia + Baltic states, and Caucasus + Black sea
First, mission trees for nice runs like Karabakh into Armenia, Riga into Kurland/Prussia, Teutonic and Livonian Orders crusading Russia...
and expand the old ones : Denmark, Sweden, Lithuania …
Maybe a Quest for the Golden Fleece in Georgia?
I was looking for some formable tags, but considering there already are formable and many releasable, I don’t think there is a special need. Could be fun to have the Kingdom of Pontus for nations like Candar, Trebizond and Theodoros.
Rework some culture and religion like Estonian and Finnish in the same culture group, or some Greek/Pontic provinces in Anatolia, old Prussian culture, paganism in northern Scandinavia …
Rework Lithuanian special government (I believe it’s the weakest in the entire game)
Rework Cossacks estate which is barely useful since Emperor
Navigable Caspian Sea, plus a buildable canal to link Caspian Sea and Black Sea ?
Could be an opportunity to rethink the standard Christian monarchy government :
Many nations in Eastern Europe have government reform with special mechanics (Prussia, Ottomans, Tsardom, Hordes, Iqta), so it’s a bit weird than the most common government is so empty.