Good call. I will add these and some more for the next version.
As for having multiple inputs in these nodes, I will have to refactor the way these nodes (SimplexNodes) work. One idea I have in mind is the ability to have a special List input, which though is special in the sense that instead of exposing an actual List port type, it exposes a list of ports of T type.
I will take a look at implementing this as soon as possible.