I agree with almost every comment made in this thread.
However, when I do get a chance to play the games are amazingly long as is. I believe that Larry Harris/ MB/ AH had to balance out the fact that the true strategy games were appealing only to the hardcore war gamers, while games like risk were a bit too simple.
I have a ton of house rules, as most of us do, but the out of the box game does need to stay relatively uncomplicated to keep a broader appeal. And if it doesn’t have that appeal, places like this where we can talk about it probably don’t exist. A fifteen year old kid probably isn’t that interested in alot of the historically accurate details, and might not play much if one turn took two hours or they constantly had to return to the rule book for clarification.
I assume that alot of the things that we feel are missing are subsumed by the IPC cost. For example- supplies, logistics, intelligence. For 3 IPCs you get an Infantry unit along with the rail supply, reinforcements, and other support needed to keep it going in the field.
That having been said- sub warfare (including commerce raiding), AA rules, air combat, and National Advantages all need, IMO, alot of tweaking (or inclusion) for those of us who are interested in expanding the game.