I always felt the V rockets in the game are doing a little too much economic damage than they did historically. I've been thinking about it and I have a proposition to make.
V1: cost 4, range 2, 1 d3 economic damage, AA unit can defend against it, R results is a hit. After all half of these rockets were destroyed in the air. You only destroy the rocket and not the facility. You will need to conquer the area to destroy the actual facility.
V2: cost 6, range 3, 1d3 economic damage, AA can not defend against these attacks. You will need to build 2 V1 rockets to start building a V2 rocket.
Sounds historical?