Minor Indistrical Complex can build 2 units. Price of each unit can be up to 10. So 2 Fighters Jets are possible, or 2 Cruisers.
The 5 unit limit is hard for Major Complex, especially for UK. They must either invest much in Airforce or navy, or get a lot of Minors somewhere.
I can not tell about any systematics in this setup. We played it only once, and it was fun. Germany invaded London, Russia and Australia killed Japan, finally US took back Africa and won the game.
The general intention was to get rid of well known standard stategy. We want to give the players a variety of different options (Russian Offensive in the East, Japan invading Australia, Germany invading UK, heck even Japan invading Western US etc). I am very sure this first try is far far away from perfect, even far away from good. There are sure a lot of tactics better than others. Unfortunately only with your help, we will be able to find them and even them up with the weaker ones.
I hate these standard maneuvers, sinking this navy in G1, stacking up there in R1 etc … We want fresh and new games, with uncertain outcome. And we want navy. Thats why we added all those additional ships to the board. We had quite a long time to balance the UK indian ocean navy. But we suck, our game experience is small, we play all those other games as well.
Nevertheless, we would be happy if some of you pros would try this set of house rules, and tell us the opinion, and things to make better.