Well, as an Austrian and defender of the monarchy and Austro-Hungarian union I must say that they should put Austro-Hungarian ships in the game.
Although K.u.K Krigsmarine is not the best, they could create a small, Technological Tree for our Country.
K.u.K. Krigesmarine was one of the most powerful of the Mediterranean and adding them would be, not only an opportunity to improve the focus on Ships of World War I as well as expand the Mediterranean scenery.
The Kaiserliche und Königliche Krigsmarine can be used for many purposes as well as the launching of the Focus on Ships of the Second World War and a few minor differences.
I really hope you consider my suggestion.
Thank you.