It means an open road to exploits and gamey tactics...
It's not like the game is balanced now. Germany is simply better than Sweden, for instance, in every respect. I'd rather have historical options and then get to decide how to use them. Who cares how I play anyway, unless it's multiplayer in which case a lot of the normal expectations go out the window (no, France and the UK will not sit quietly by while Germany invades Poland with almost the entire army) so the gamey tactics don't work anymore anyway. It is also much more historically accurate, licensed versions of weapons, tanks etc were and still are very common in all minor nations.