There has not, not once, ever been a perfect board game.
And I know some office junkie is going to sarcastically list something like Monopoly or Sorry. No, those where not perfect. Neither is AA50. Or Twilight Imperium, or A&A Pacific 1940.
But you know what? They’re still great games. I fully expect Europe 1940 to have a few mistakes and still be great. If it didn’t have any mistakes at all, something has gone horribly wrong.