Given that you can restore Kaiser Bill in the most recent version, and France goes communist more often, it would be interesting to incorporate more alternate history.
Maybe add an option of an earlier start date - say 1935, 1932, or even 1930. You might end up with a vanilla-fascist Germany, or a communist one, or maybe the Weimar Republic survives. Maybe FDR never becomes president for some reason - what happens to the US under a different leader? Maybe the Abyssinia Crisis is navigated peacefully - does Italy become neutral, or is it still hostile to Germany? Does Japan still go down the path of militarism, or remain democratic?