I'm surprised that you cannot select the first two adventurers, it makes it very annoying trying to get two characters that fit your playing style, and restarting over and over again.
There should be a Activation setting, you could choose when you want a certain weapon to activate. Lets say you want a Rocket launcher to turn on after 30 seconds, you put on the 30 second button and your good. Or if you choose to turn on a firegun when the doll reaches 5000 health. It would be a great way to improve manipulation of the enviornment.