I think that you should add some recipe that uses epic cards to the nexus (50 epic = 1 random epic?). Right now I have loads of duplicated epic card that I will never have a use for
I really think an experience system is necessary. So if you don't take an active part in the combat you won't progress mutch, and there would still be a reason to go on playing. Right now I have the best weapons, a lot of money and my character can't enhance anymore... why should I go on playing? But I want to go on playing :) 5/5 but I'm really waiting for wasteland 1.0