I don’t know how you guys are attacking the true neutrals with the allies in Global. The problem with attacking the Neutrals is that you need US to invest heavily in the attack to make it pay off, while this is great on the Europe side of the map, Japan is surely going to win if you invest that heavily with US in Atlantic. 20 ground troops a turn is Amazing for America landing in Spain every turn, but 60 dollars worth of infantry means nearly nothing is going towards Japan. Sounds great, but as usual I think people really underestimates Japans ability to win. India is a sure thing, and if Japan is building fleet, then Hawaii would be a sure thing as well.
I think it depends on how the game is going in Europe. US might not need that many ground troops to land in Spain and hold it with UK reinforcements/air.
To make Spain worth taking US needs to constantly be shucking 20 guys over. This is because when you take Spain you give Afghanistan, Sweeden, Switzerland, and Turkey to the axis powers. Also the Mongolian troops. The whole point of landing in Spain is that you now give UK and US a place to land in Europe. This is why I don’t think attacking Spain is worth it in Global because you have Japan to worry about.