So has everyone started work on creating their little CK2->EU4 save yet? I loaded my big Finnish empire at an older save slated in 1300, and started working on making various AI countries as strong as possible (limiting my own expansion to cover only two provinces for Baltic Sea encirclement), in order to have a few interesting Lucky Nations turned on. So far, the AI has managed to achieve great success once I bumped it in the right direction as the pre-eminent British Islands power Alba (Welsh Scotland covering most of the islands, basically) by loading and forming Empire of Britannia there (and promptly started gobbling up everything on the islands, and still hold firmly to Brittany). Now there's one nice big and rich power in the West.
Additionally, I've been making efforts to keep the Basque in Navarra strong enough for reconquista, enriched Muslim cultural diversity (Sunni Despot of Greece is now Greek instead of Bedouin Sultan of Abyssinia), cheated up a Persian mega-revolt to get a big Zoro empire instead of the Arab rag-tag cloth around the Middle-East, SULTAN OF MIGHTY GEORGIA IS IN, the big Frankish superpower in Central Europe (covers all of Italy, controls Northwest Germany, and holds Bavaria) now uses Burgundy as main title so my brian doesn't hurt at Frankish Italy or Bavaria, Empire of Tartaria has started a resurgence on its own (now moved into Georgia, becoming an eminent AI power around the Black Sea), and there's some niggers in Mali. Lie, cheat, steal, occasionally do it legit by accidentally raiding where unwanted AI armies are located, and cheat a shit-ton, but it's starting to look like a much more interesting map for conversion (as long as the damn Burgundians and Welsh keep high Authority).
Sadly Poland manage to fuck itself over in internal strife behind my back, so now there's just Mazovia and Silesia as independent potato states there.
The fact the converter makes a canned mod is actually really good, makes it easy to modify and customize aspects of the whole thing.