From: Sheridan Wyoming, USA
Yep, some limitations would be nice, Italians regularly show up in France after they DOW on AH, and french and UK troops helped them defend after some success against them with the CP, which was somewhat unrealistic. Not to mention the Bulgarian army in France and other parts, which happened in small scale, but not whole corps and more.
It could even be expanded, like Romanian troops only entering into AH, Serbia and other Balkan countries and Russia, no ventures into Germany or Ottomans, and similar limitations on every/most countries, esp the minors.
I agree, an MPP cost to make a unit capable of doing this. Nothing huge like a buying a Corp but for a unit already on the map 50-75 MPP and include an operational movement to the target country.
One thing I have seen that bothers me is with French troops fighting in Italy while the Germans advance into France. The above would make it possible if the situation were suitable for moving home country troops to somewhere else, but it would also have a price that needs to be paid to give pause for thought as to whether to do it or not.
Sometimes things said in Nitwit sound very different in English.