Interesting, I just ran an observe game that looked sort of similar (except for Burgundy, which got inherited before 1450, haha): Europe partitioned into several roughly equally balanced Great Powers all in a row. Poland never PUed Lithuania, so it went Portugal-Spain-England-France-Netherlands-giant Austria-Poland-Lithuania-Sweden-Russia-Ottomans. Almost boringly close to real life, except it suggests the current iteration of the game is pretty well balanced, which is nice.