Good pick. I would also like to see that doctrine work. I guess everybody gave up on it and even stopped talking about it.
I've experimented with the Soviet Defensive Doctrine before and I grew to like it. They are capable of causing the Axis a few headaches with their Tank Traps and Mines.
I find that people are not using Tank traps properly. Instead of using them to block vehicles outright, why not stagger them about instead? They are great when used in this fashion in a contested area. Especially in a chock point. I make sure the traps have an opening but make them in layers so that a vehicle has to zig zag through them. This slows them down a LOT and makes them highly vulnerable to AT Guns. That and they leave the path open for you since it's not completely blocked off.
How do they get made in a contested area you ask? Mortar smoke help greatly with this when fired directly on the desired spot. The traps can be made more safely this way. Let's not forget also that they provide heavy cover and Engineers tend to have Flame Throwers. Think about that for a second.
Of course, this tactic needs at least 3 Engineer Squads to be effective.