While Rheinland does have a bloody nose they are still far better off than Kusari is, with the ending of the Liberty-Rheinland War they now have the manpower to better deal with the Dresden Problem and potentially take the fight to others like the Corsairs who seek to have their own slice of the Rheinland Pie.
Rheinland may not be as strong as Liberty, but they are still quite the force to be reckoned with, have access to the treasures of the Omegas and still have some foes to direct any of the Militarists in their nation at to fight such as the Hessians (along with the regular Rheinland Pirates) or the Corsair Empire.
Rheinland has alot of options to choose from since the war's end and opportunities to help create their own future to improve Rheinland even further. It just takes effort, a strong will to see it through and like-minded people working alongside eachother.