I'm finally found time to come back to this scenario

I started a game as SU, Sid, with version 1.3. Here are my first 5 turns:
1 - 36/1939:
My first though was going with history and attacking Poland, but I abstained from that because it would have drawn the Allies into the war.So I decided to went to Persia/Iraq as first target.I concentrated tanks and mechanized forces at the Persian border.My cities focus on building workers and infrastructure.
IBT:
DoW: Spain on Germany;
France on Turkey;
GB on Greek;
Germany on Norway/Denmark
2 - 37/1939:
Declared war on Persia.Traded ressources with Germany and Japan for about 100 GpTM.Moved a lot of troops to get rid of undefended cities.Opened embassies in all countries without.
IBT:
Lots of DoWs: Italy, Japan, Bulgaria, Romania, Hungary, Finaland ---> all on Norway/Denmark;
Turkey on Italy;
Germany, Japan, Bulgaria, Romania, Hungary and Finland ---> on Turkey; Thailand and Spain on French;
Yugoslavia on Italy;
Germany, Japan, Bulgaria, Romania, Hungary, Finland ---> on Yugoslavia; China, GB, USA, Poland ---> on Spain;
China, GB, USA, Netherlands, Poland, Belgium ---> on Turkey
3 - 38/1939:
Conquered Tabriz and Meshed.Lost a T34.
IBT:
DoWs: US on Chile;
Italy on Spain;
China, GB, US and Poland ---> on Thailand
4 - 39/1939:
Conquered Kerman and lost another T34.Traded ressources with Argentinia for about 100 GpT.
IBT:
Germany has conquered Poland.
5 - 40/1939
Kabul, Gwador (both without any resistance), Bushire and Teheran(lost 3 T26 and 1 MRD here) conquered.
IBT:
DoWs: Norway/Denmark on France
Observations:
Reasearch: maybe it is because I'm playing Sid...but the best is still to set science to 0% and create a single scientist (100% science makes no or only a few turns differnce in research time!) My cashflow is around 1000GpT and I can use the money later to buy tech (or to steal it, if I'm at war with all big countries).My suggestion is setting max research time very high and lower research costs.This way it would be more of a strategic decison to spend money on research.
AI happiness: During opening embassies, I noticed that the AI (esp. Scandinavian countries) has great problems with happiness - they often create lots of entertainers which hamper their producton.Perhaps democratic countries should have an special bulding which gives them happiness to compensate for lack of MP.
Police Stations: They are way to cheap for what they do.Courthouses are far more expensive and do not decrease WW!