if I buy an Industrial Complex with Germany, it goes off the Adriatic Sea where I can dump boats to help defend Italy. A Major Complex in Romania sounds great on paper, but I’ve seen it a few times and, in my humble opinion, you are better off getting 10 infantry and walking them down there. Even better, I think, transports in the North Sea as it lets you threaten North Russia, Leningrad, Scotland and England as well as moving off the coast of France.
Just my opinions and observations.