@wirkey Totally inactive but hostile neutrals is a TripleA only feature, inexistent the basic games, that has found a lot of favour amongst mapmakers, and that figures extensively in almost all the most popular custom games.
Regarding its silliness, you would say it about whatever historical modern maps having any of those, comprising Total World War (for example, Mongolia, that should actually rather be a minor of Russia since start game or even just part of Russia) (on the other hand, for example, you would probably agree it is acceptable in 270BC, instead).
Sure I know it's been an feature for many maps and sure I know it makes a lot of sense in most games. I just don't like it that much...
About Mongolia, I tried to make them a minor in TWW, but I just suck with xml. All I could do was to get Tac Bombers being able to land on carriers. My preferred option for Mongolia would be the same as I suggested for NML: if Axis (most likely Japan) attacks them, all other territories with all other units turn Russian. You have to think twice about that teleporting deep into China (I do that move, too. But I always feel a bit ashamed)
No clue about 270BC. Never played that map (no airplanes...). But just by the name I'd say there were a lot of tribes around, so it seems fine for me