A new nation would be good, but you have to think of the work. They have to look up the uniforms, to look up which troops a.s.o..
They haven't got this much time to being busy with NW AND BCoF.
And if there would be a new nation, that would come with another update.
PS: If i could choose, which nation they could do, i would say: Please make the Rhine-Staates (Württemberg, Bavaria, Saxony, Hannover....)