My first playthrough, I used the specific difficulty modifiers and gave Japan High Difficulty... maybe I shouldn't have done it: this is what happened, it is end of 1940 now:
Difficulty is Hard.
First of all, Japan defeated China by mid-1938 (!). But I have nothing against a bit more difficult game, however I was almost shocked that there is not a single decision/event associated with Japan vs. National China?!? There was no event for outbreak, none for the defeat of China, nothing. I couldn't do ANYTHING to help the poor Chinese... Lend-Lease was not possible for a long time.
Secondly, and much worse, this is the situation in Europe since 6 (!) months - there wasn't any Major change, at most 5 provinces might have changed ownership, I didn't keep track of it so much:
http://h11.abload.de/img/hoi3game2012-02-2016-tukh3.png
Look at the date. Norway was defeated just 2 days before. Can I expect Germany to actually defeat France after this? And even more importantly, if they can't defeat BeNeLux+France, how will they have any chance against Comintern?
Apart from this, and I'm sure all this will be balanced by future patches, the DLC is great, especially for 2 $ you can't really complain.