Found it, interesting part in
bold(note, this is steam review... I hope it's allright to post it, if not I would appreciate if modder could either leave the relevant part with enough context or let me try to do it):
"
NO... JUST NO
Its not possible to find so meny mistakes and bug in a "dlc".
Its even worst than death or dishonor. At least in death or dishonor you did a focus tree and thats ok its works in this expansion pack you do a focus tree and everything is broken, even if you go "Historical" in 1941 everything stop make sense. FOR EXAMPLE, d-day started in 1939 and soviet enter allience with axis, i repeat in historical. In another run, I took greece and i got the democratic path, i like how accurate is to go from democratic to fasist if the dont help for the major power and if they help you you stay democratic but thats not the problem, the problem is that they decide to help you and they ruin your run, france cant do s*it
and UK for some resone they take all the land and my cores. And this is not the only problem the other problem is F****** ROMANIA they C**kBLOCK EVERY F***** FOCUS TREE IN THIS ******** EXPANSION PACK. I tried 16 runs and all the runs with greece and bulgaria (i dont try with turkey becose i belive turkey its to powerfull for my standards) and every time i did war Romania just protect everyone in balkans, thats not the problem here the problem is that they enter in faction as fast as posible and the start ww2 in '38 ~ '39 IN EVERY ROUND.
I belive the expansion pack is good but its not ready its full of bugs and if you play for the achivement its ruins you 80% of your runs.
Oh i forgot the new bug that when the enemy take the airport that you have your planes you lose them all, not to the enemy, just the airplane vanish!
"
Note: I tend to play predominantly as Britain(/UK/ENG/whatever), so actually being able to steal Greece lands would be interesting for me

I.e., I'm wondering how this feature works as it's not explained anywhere, I'm not criticizing it (although that review does).