Just a few things rcoutme...
First thing: both Dell and I agree that tech research rates need to be increased. They are just too slow...especially poor Russia who prolly won't get a single tech researched.
Secondly, the whole stipulations with alliances is although accurate, takes some of the civ features out of the game. I know it is historically accurate, but it is really not fun... Anyways, I doubt if I will play another locked alliances at war game because they lack diplomacy which is the main feature of Civ PBEMs. Without the diplomacy of Civ I might as well be playing a real time war game.
As far as improving the scenario is concerned, the only change required is speeding up the tech rates or shortening the individual tech costs.