It pretty ez, at least to me. That is one of the first things I noticed when I started playing, next to the on WEA the missiles have a drop down. So now WEA has to take an extra step when selecting a new type of missile.
Missile and drones are two different things. On the screens, they look similar. Drones look like they always have. Solid floating orange triangles. Missile however look different while traveling through space. They are flashing floating orange triangles. You cannot select the missiles like you can drones, nor can you shoot you down.
I am pretty sure all three will make it into the next update.