Larry says everyone gets to build tanks on turn 4. That looks like it.
For my money, techs are more appropriate for this game than in WWII. However, my implementation would be rather different, that is that the enemy would be able to copy a tech a couple of turns after it is introduced. Techs in this war were innovative, rather than particularly advanced, hence easier to copy than WWII techs such as jet fighters. The copier would still have to pay to develop the tech, but with a guaranteed result, so the advantage would not be so great.
Still, having tanks for just a couple of turns before the enemy produces their own version could lead to an important breakthrough.
Looks like I’m alone in wanting the fighter plane arms race represented. But I do believe the fighters of 1918 were a heck of a lot better than the string bags of 1914. I’d only want this if there are separate sculpts to represent the new fighters, however.
I do agree that techs should not be the decisive factor in the game; this war should still be about attritional infantry and artillery battles above all. But tanks and aircraft did give the edge to attacks in the later years of the war, albeit they still needed artillery and infantry support. Tanks without inf & art were as useless in attack as they were in defence.
http://www.youtube.com/watch?v=OofSP8NXQXI