Amazing mod, probably the best I've played yet (to be fair I haven't yet checked out World in Flames ) and I hope it keeps getting updated. Here are some things I noticed.
Peacetime industrial base is simply vastly superior to wartime, even for Germany. Hell, especially for Germany, since they easily make up for the dove and isolation shifts. The early +14% research boost is simply massive because research increases exponentially in this mod.
The wartime base should give more TC, manpower, and other benefits to be worthwhile. IC and a couple slider moves just isn't worth it.
It's possible to get the most modern submarines before the war breaks out. The UK gets thrashed by them.
Tanks aren't worth the trouble. It takes so many technologies to ever be able to use them.
The US is insanely powerful, but I like it.
The AI uses nukes, which I also like. It makes capturing airbase islands (such as the UK ) very important.
A major issue: Africa is still pointless. It's not loaded with rares or any other resource. There's no point to fighting for it.
Japan usually does very poorly against China. China has so many men...
Also, there are so many changes it should have a manual but I couldn't find one.